Answer:
x = 4, -4, 7i, -7i
Step-by-step explanation:
(x^2 – 16)(x^2 + 49) = 0
x^2 – 16 = 0 or x^2 + 49 = 0
x^2 = 16 or x^2 = -49
x = ± 4 or x^2 = ±7√-1 =±7i
The legs of a right triangle are x + 1 and x + 4. What is the area of the triangle?
Answer:
(x^2 + 5x + 4) : 2
Step-by-step explanation:
Find the number of possible ways one can choose marbles from a bag containing three marbles: a) if the order is important b) if the order is not important.
Answer:
There are 3 marbles, that we assume are different.
Let's define them as marble 1, marble 2, and marble 3.
a) If the order is important, and we select the 3 marbles, then:
for the first marble, we have 3 options.
For the second marble, we have 2 options (because one is already taken)
for the third marble is only one option.
The total number of combinations is equal to the product between the numbers of options, so in this case, we have:
C = 3*2*1 = 6 combinations.
Now, if we only select 2 marbles from the bag, we have:
for the first marble, we have 3 options.
For the second marble, we have 2 options
Here the number of different combinations is:
C = 3*2 = 6 combinations.
And if we select only one marble from the bag, we have:
for the first marble, we have 3 options.
Then here are only 3 combinations.
the total number of combinations is:
C' = 6 + 6 + 3 = 15 different combinations.
b) If the order is not important, then there is only one combination when we draw the 3 marbles.
When we draw one marble there are 3 combinations (one for each marble)
When we draw two marbles, again there are 3 combinations (one for each marble that we do not draw)
then the total number of combinations in this case is:
C = 1 + 3 + 3 = 7
2.
Say True or False.
(i) The difference between the smallest number of seven digits and the largest
number of six digits is 10. False
(ii) The largest 4-digit number formed by the digits 8, 6, 0, 9 using each digit only
once is 9086.
IS
:)
.
(iii) The total number of 4 digit numbers is 9000.
Answer:
i) false
ii) false
iii)false
Answer:
true ans is correct
Step-by-step explanation:
true
Which of the following is a parent function?
O A. f(x) = e*
O B. f(x) = 2.34
O x
C. f(x) = x4 +3
O D. f(x) = 2e2x
Answer:
[tex]f(x) = e^x[/tex]
Step-by-step explanation:
Given
Options (a) to (d)
Required
Which is a parent function
A parent function is such that has a single term without coefficients
From the list of given options
[tex]f(x) = e^x[/tex] suits the above definition
Other options (b) to (d) either have coefficients, or have multiple terms
The circumference of a circle is 17pi ft. what is the area, in square feet?
Answer:
72.25 pi ft^2
Step-by-step explanation:
The circumference of a circle is
C = 2*pi*r
17 pi = 2*pi*r
Divide each side by 2pi
17 pi / 2pi = 2 pi r / 2pi
17/2 = r
We want to find the area
A = pi r^2
A = pi ( 17/2) ^2
A =289/4 pi ft^2
A = 72.25 pi ft^2
The value of a gold coin picturing the head of the Roman Emperor Vespasian is increasing at the rate of 11% per year. If the coin is worth $135 now, what will it be worth in 12 years?
Answer:
[tex]A = 135(1.11)^{12}[/tex]
A= $472.29
Step-by-step explanation:
Need help we will be posting questions no leaks max points
Answer:
6
Step-by-step explanation:
To find the mean you need to add up all the number & then divide it by the total number of numbers.
7+6+7+6+6+7+6+4+5= 54/9 = 6
Answer from Gauthmath
Answer:
6
Step-by-step explanation:
To get the mean, you must add all numbers and divide it by how many digits you have. So 54 (Sum of all numbers) divide by 9 (9 digits) is 6
What's the slope (-3,6),(-3,4)
Answer:
undefined
Step-by-step explanation:
Here,
x1 = - 3
y1 = 6
x2 = - 3
y2 = 4
Formula : -
Slope = ( y2 - y1 ) / ( x2 - x1 )
Slope
= ( 4 - 6 ) / ( - 3 - ( - 3 )
= - 2 / 0
= undefined
Answer:
The slope is undefined.
Step-by-step explanation:
slope(m):
y2-y1/x2-x1
4-6 / (-3)-(-3)
-2 / 0
undefined ∞
Evaluate the expression when a=-6.
a^2 + 5a - 5
Answer:
61
Step-by-step explanation:
(6)^2+5(6)-5
=36+30-5
=61
Answer:
1
Step-by-step explanation:
[tex]( - 6) {}^{2} + 5 \times - 6 - 5 \\ 36 - 30 - 5 \\ 36 - 35 \\ = 1[/tex]
Which expression is equivalent to 17x − 8x + 2 and why?
2 − 9x, because (17x − 8x) + 2 = −9x + 2 = 2 − 9x
2 + 9x, because (17x − 8x) + 2 = 9x + 2 = 2 + 9x
11x, because 17x − 8x + 2 = 9x + 2 = 11x
7x, because 17x − 8x + 2 = 17x − 10x = 7x
Answer:
2 + 9x, because (17x − 8x) + 2 = 9x + 2 = 2 + 9x
Step-by-step explanation:
17x - 8x + 2 = (17x - 8x) +2 Combine like terms.
= 9x + 2
Like terms have same variable of same powers.
Answer:
2 + 9x, because (17x − 8x) + 2 = 9x + 2 = 2 + 9x
Step-by-step explanation:
17x - 8x + 2 = (17x - 8x) +2
Combine like terms.
= 9x + 2 Like terms have same variable of same powers.
Still stuck? Get 1-on-1 help from an expert tutor now.e3radg8 and 3 more users found this answer helpful
Find the value of x
2x degrees and 3x degrees ..
they are supplements angles
Answer:
2x+3x=180°
that is 5x=180°meaning x=32°
Find the first, fourth, and tenth terms of the arithmetic sequence described by the given rule.
is it a,b,c or d?
Answer:
5
5 1/2
6 1/2
Step-by-step explanation:
Let n=1
a1 = 5+(1-1)*(1/6)
a1 = 5
Let n=4
a4 = 5+(4-1)*(1/6)
a4 = 5 +3(1/6)
a4 = 5+1/2 = 5 1/2
Let n=10
a10 = 5+(10-1)*(1/6)
a10 = 5 +9(1/6)
a4 = 5+3/2 = 5 + 1 1/2 = 6 1/2
Please help me solve this guys Thankyou so much
Step-by-step explanation:
first blank: 0 seconds
second blank: 9.8 seconds
third blank: 5 seconds
fourth blank: 120 meters
Travel Agency offers vacation packages. Each vacation package includes a city, a month, and an airline. The agency has 3 cities, 3 months, and 1 airline to choose from. How many different vacation packages do they offer?
=___
If you could answer them all It would really be helpful PLEASE marking brainliest
Answer:
1. the area of the triangle minus the area of the small, inner rectangle. what did you not understand there ?
the standard formula (hi, internet !) for the area of a triangle is baseline×height/2.
the standard formula (hi, first grade !) for the area of a rectangle is length×width.
that's it.
1.a.
the volume of an object regularity shaped like a silo is always ground area times height.
for this object we only need to imagine to stand the object up sideways on the triangle side.
and don't forget - an area is always a square unit (like cm²,m², ft², ...). and a volume is always a cubic unit (like cm³, m³, ft³, ...).
so then, the triangle area is the ground area. and the original long side line of the object is is height.
as we said in 1. above, the area of a triangle is baseline×height (of the triangle, not of the overall object) divided by 2.
so, we have here 6×4/2 = 6×2 = 12 m²
and now the ground area × object height = 12×8=96 m³
b.
the standard formula for the volume of a ball (hi, internet !) is pi×r³.
so, we have here pi×9³. can you calculate that with your calculator ? that is pi×729 = 2290.221 cm³
2a.
the height of the cone is (as the drawing already suggests) determined via the right-angled triangle of the radius (half of the diameter) of the ground circle, the height of the cone and the length of the sideline on the outside mantle of the cone. this sideline is the Hypotenuse (the baseline of the triangle opposite of the 90 degree angle).
so, we use Pythagoras
c² = a² + b² (c being the Hypotenuse, a and b being the sides).
11² = 8² + h²
121 = 64 + h²
h² = 57
h = 7.55 cm
2b.
the standard formula for the volume of a cone (hi, internet !) is
pi×r²×h/3
pi×8²×7.55/3 = pi×64×7.55/3 = 506 cm³
Step-by-step explanation:
all of that you could easily search on the internet and since it yourself way faster than putting things in here and waiting for responses.
as there is really nothing to explain but just to use the standard formulas with the given numbers.
Sarah wants to print copies of her artwork. At the local print shop, it costs her $1 to make 5 copies and $5 to make 25 copies. What is the constant of proportionality in this direct variation?
A. 1/5
B. 5
C. 1
D. 1/25
Answer:
1/5
Step-by-step explanation:
because multiply any different copies by 1/5 to get the cost of the print shop
Is this table a function why or why not?
Answer:
yes
Step-by-step explanation:
functions have one input for every output.
the input side has unique and individual numbers therefore it's a function.
Alex is twice as old as Bernard and Calvin is 8 years younger than Alex. If the sum of their ages is 52, how old are they?
Answer:
Currently, Alex is 32 years old. His son is 8 years old,
Solution: denote the age of Alex’s son as ‘x’. Alex’s age is 4x
In 16 years, Alex’s age will be 4x + 16. His son’s age will be x + 16
4x + 16 = 2(x+16). solving this equation yields:
4x + 16 = 2x + 32. Grouping like terms algebraically gives: 2x = 16
Thus x = 16/2 = 8. 4(8) = 32
Answer:
Alex is 24, Bernard is 12, and Calvin is 16.
Step-by-step explanation:
Let Alex's age be A, Bernard's age be B, and Calvin's age be C.
We can write equations to model each situation.
Alex is twice as old as Bernard. In other words:
[tex]A=2B[/tex]
Calvin is eight year younger than Alex. In other words:
[tex]C = A - 8[/tex]
And the sum of all their ages is 52. Therefore:
[tex]A + B + C = 52[/tex]
This is a triple system of equations. We can solve it by substitution. Substitution A and C:
[tex](2B)+B+(A-8)= 52[/tex]
Substitute:
[tex]2B+ B + (2B) -8 = 52[/tex]
Combine like terms:
[tex]5B-8=52[/tex]
Solve for B. Add 8 to both sides:
[tex]5B = 60[/tex]
And divide both sides by five:
[tex]B=12[/tex]
Therefore, Bernard is 12 years old.
Since Alex is twice as old as Bernard, Alex must be 24 years old.
And since Calvin is eight years younger than Alex, Calvin is 16.
In conclusion, Alex is 24, Bernard is 12, and Calvin is 16.
The sum of two numbers is 0. Twice the smaller number subtracted from 3 times the larger number is 10. Let x
represent the larger number and y represent the smaller number. Which equations represent this situation?
VX
y=3x-5
y=x
O
y = x-5
10
y = 3X+ 3
y=-x
о
2 10
y = 3x+
Step-by-step explanation:
x+y=0
x=-y
or, y=-x
3x-2y=10
what is it initial value
None of the multiple choice add up to 102 degrees any help?
Answer:
26
Step-by-step explanation:
Let x = the third angle in the triangle
x = 102 because they are vertical angles
The sum of the angles in the triangle are 180
b+2b+102 =180
3b+102 =180
3b = 180-102
3b = 78
Divide by 3
3b/3 = 78/3
b = 26
Answer:
Its is 26 aka E
Step-by-step explanation:
So we know that a triangle has 180 degrees in total. So we know one side is 102 degrees. 180-102=78. we can do 78 divide by 3 since there is 3b's in total. 78/3=26. Therefore, it is 26 which is E. I hope this helped ^^.
Help please anyone please
Welp....there's your answer
An equilateral triangle has a perimeter of 18 feet. If a square whose sides have the same length as one side of the triangle is built, what will be the area of the square?
Answer:
36 ft²
Step-by-step explanation:
equilateral means all sides are equally long.
a triangle has 3 sides.
in our case they are all equally long.
and their sum (all 3 sides together) is the perimeter
P = 18 = 3 × side length
side length = 18/3 = 6 ft
a square with the same side length (6) had then an area of
side length × side length = 6×6 = 6² = 36 ft²
it is important to remember : a length is measured e.g. in feet (ft). an area is then meshed in square-feet (ft²). it is important to add this to the calculated numbers to express the right dimension of these numbers.
Identifying linear pairs and vertical angles
Answer:
(a) <7 and <8
(b) <3 and <8
(c) <6 and <1
Step-by-step explanation:
There are multiple different answers for each of the questions but these are the ones I chose.
(a) A linear pair is two adjacent angles that intersect and form a straight or 180-degree angle. This means that the angles are supplementary. Since angles 7 and 8 make a straight line on line n, they must be a linear pair.
(b) Vertical angles are two angles opposite of each other that share a vertex. Angles 3 and 8 are opposite of each other, made of the same lines, and share a vertex. This makes them vertical angles and congruent.
(c) As aforementioned, vertical angles are congruent. So, any vertical angles listed could answer this question. For example, angles 6 and 1 are vertical angles, and therefore congruent.
5. Solve each of the following quadratic equations using the Quadratic Formula (Express all roots as integers or as real numbers rounded to one decimal place)
a) 2x2 – 3x - 10 = 0
b) 3x2 - 8x + 4 = 0 (answer pls:)
What is the area of this triangle?
Answer:
the answer of the question is D
Use what you know about sine, cosine, and tangent to calculate the height of the buildings in the diagram below.
Answer:
x = 32 feet
Step-by-step explanation:
By applying tangent rule in ΔACD,
tan(40°) = [tex]\frac{\text{Opposite side}}{\text{Adjacent side}}[/tex]
= [tex]\frac{AB+AC}{CD}[/tex]
= [tex]\frac{x+BC}{87}[/tex]
x + BC = 73 -----(1)
By applying tangent rule in ΔBCD,
tan(25°) = [tex]\frac{BC}{CD}[/tex]
= [tex]\frac{BC}{87}[/tex]
BC = 40.57
By substituting the value of BC in equation (1),
x + 40.57 = 73
x = 32.43
x ≈ 32 feet
2
Which is equivalent to 2435?
12
Answer:
C
Step-by-step explanation:
(243)^(2/5)=3^2=9. C is the correct answer
It can be concluded that the equivalent value of the expression is 9.
What is algebraic expressions?An algebraic expression is a made up of terms both constants and variables. For example, we can write -
2x + 3y + z
5x + y
x + 8y
Given is the algebraic expression as -
[tex]$243^{\frac{2}{5} }[/tex]
The given algebraic expression is -
[tex]$243^{\frac{2}{5} }[/tex]
It is asked to find the equivalent value of this expression. We can write -
[tex]$243^{\frac{2}{5} }[/tex]
[tex]$3^{5\times \frac{2}{5} }[/tex]
3²
3 x 3
9
So, it can be concluded that the equivalent value of the expression is 9.
Therefore, it can be concluded that the equivalent value of the expression is 9.
To solve more questions on straight line, visit the link-
https://brainly.com/question/29223887
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Algebraic math question
Answer:
[tex] 7 \: {ft}^{2} [/tex]
Step-by-step explanation:
Area of the trapezoidal table
[tex] =\frac{1}{\cancel 2}(4 + 3)\times \cancel 2[/tex]
[tex] = 7 \: {ft}^{2} [/tex]
Answer:
7 ft squared
Step-by-step explanation:
Area of the trapezoidal table
What's 672 divided by 32
Answer:
the answer is 21
Step-by-step explanation:
