Mathematics High School

x + y = 5.90
2x + 4y = 16.80

Answers

Answer 1
What are you looking for ?
Answer 2
2+4y(5.90-y)=16.80

We move all terms to the left:

2+4y(5.90-y)-(16.80)=0

We add all the numbers together, and all the variables

4y(-1y+5.9)+2-(16.8)=0

We add all the numbers together, and all the variables

4y(-1y+5.9)-14.8=0

We multiply parentheses

-4y^2+23.6y-14.8=0

a = -4; b = 23.6; c = -14.8;
Δ = b2-4ac
Δ = 23.62-4·(-4)·(-14.8)
Δ = 320.16
The delta value is higher than zero, so the equation has two solutions
We use following formulas to calculate our solutions:
y1=−b−Δ√2ay2=−b+Δ√2a

y1=−b−Δ√2a=−(23.6)−320.16√2∗−4=−23.6−320.16√−8

y2=−b+Δ√2a=−(23.6)+320.16√2∗−4=−23.6+320.16√−8

Related Questions

A barrel has 15 liters of water. There are approximately 29.6 milliliters in 1 fluid ounce. Which measurements is closer to the number of fluid ounces in 15 liters

Answers

Answer:

Step-by-step explanation:

There are approximately 29.6 milliliters in 1 fluid ounce. W… ... Which measurement is closest to the number of fluid ounces in 3 liters ? A. 89 fl ... We have been that some doctors recommend that men drink 3 liters of water every day . There ... Use that information to find the product of 7/8 x 40 for 15 points.

Somebody help me please....Make it right..

Answers

Answer : 4/15

Step-by-step explanation:

Answer:

2/5

Step-by-step explanation:

2/15, 1/5, 4/15, 1/3

Get a common denominator

2/15, 3/15, 4/15, 5/15

We are adding 1/15 each time

The next term would be 6/15 which simplifies to 2/5

The diameter of a circle is 8 meters. What is the circle's circumference?

Answers

Answer:

25.13 square meters

Step-by-step explanation:

The formula for finding the circumference of a circle is πd or pi times the diameter

Diameter = 8 meters

Pi = 3.14

3.14 times 8 = 25.13

Plez help finding percent change


Answers

Answer:

can't see proprly

Step-by-step explanation:

Help please I don't get how to do this

Answers

Answer:

15:5 = 18:6 = 21:7

The scale factor is 1/3 or 0.33.

Step-by-step explanation:

Solve for θ or x, round to the nearest tenth. I will mark brainliest if its correct!

Answers

cos-1 divided by (15/21) rounded to nearest tenth 44.4

The hypotenuse of a right triangle is 78 feet. One of the legs of the triangle is 30
feet. What is the measurement of the missing side? *

Answers

Answer:

b=72

Step-by-step explanation:

20*20 PLZ
CAUSE THIS WORK IS HARD AND IM IN THE 3RD GRADE

Answers

20 * 20 =400


I think that what you mean

Answer:

400

Step-by-step explanation:

so the question is 20 times 20. This problem means you are doing 20, 20 times. Since you are in 3rd grade I will use the counting meathod. So to do this you need to count starting at 20 by 20 20 times.

20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400.

As you can see the answer is 400. I started at 20 and I consistently counted by 20. Also I did it 20 times. I did this because the problem says to do 20, twenty times.

whats 4 2/5 x 1 1/2 pls help​

Answers

The answer is that (It’s 6.6)

Answer:

33/5 or 66/10

Step-by-step explanation:

First convert 4 2/5  and 1 1/2 into a improper fraction.

4 2/5 = 22/5 ; 1 1/2 = 3/2

Then multiply

66/10

And simplify

33/5

Write an equation in slope intercept form force ach trend line

Answers

Answer:

Question 5: y = - [tex]\frac{1}{3}[/tex]x + 6

Question 6: y = [tex]\frac{25}{2}[/tex]x + 100

Question 7: y = -10x + 45

Which table could represent a function?


input -5 -4 -3 -2 -1
output 0 1 2 3 4

input 4 3 2 3 1
output 10 9 12 15 2

input -8 -6 -4 -2 -8
output 1 -1 1 -1 -1

input 10 20 30 20 10
output -10 -20 -30 20 10

Answers

Answer:

First option

Step-by-step explanation:

If each input value leads to only one output value, classify the relationship as a function.

Answer:

input -5 -4 -3 -2 -1

output 0 1 2 3 4

Step-by-step explanation:

PLEASE HELP, pictures with for it, and you us waste it ill report you

Answers

Answer:

it is C the 4

Step-by-step explanation:

-6 to pos 4

2x² + 5x - 42 = 0 * PLEASE SHOW YOUR WORK *

Answers

Answer:

x = - 6, x² = [tex]\frac{7}{2}[/tex]

Step-by-step explanation:

[tex]2x^{2}[/tex] + 12x - 7x - 42 = 0

2x^{2} (x + 6) - 7 (x + 6) = 0

(x + 6) x (2x - 7) = 0

x + 6 = 0

2x - 7 = 0

x = - 6

x = [tex]\frac{7}{2}[/tex]

x = - 6, x² = [tex]\frac{7}{2}[/tex]

Use distributive property to rewrite expression -8((-2-3/4)-8)

Answers

-8(-2) - -8( -3/4) -8(-8)

What number is 36% of 3.18

Answers

Look up a percentage calculator

Answer: Percentage of 36% of 3.18 = 1.1448

NEED HELP ASAP ILL GIVE BRAINLIST

What is the area of the circle below?


A
5.64 square meters

B
7.85 square meters

C
15.7 square meters

D
19.625 square meters

Answers

Answer:

I think it is C

Step-by-step explanation:

can i have some help pls on this question i have loads
The circumference of a circle is 9.61cm.
Find the length of the diameter.
Give your answer rounded to 2 DP.

Answers

Answer:

Enter the width of the longest long axis, AB, and the length of the longest short axis, CD. Then, click on Calculate. The circumference is in whatever designation of units you have used for the entries. The formula is PI * SquareRoot of 2 * ((1/2 long axis)squared + (1/2 short axis)squared).

Step-by-step explanation:

jayfeather friend me

3.06

Answer:

3.06 i think

Step-by-step explanation:

Cost of meal for 3 at Olive Garden Restaurant with the tax is $54.

How much would a 15% tip be for the waiter? (Round your answer to the nearest dollar amount.) PLEASE HELP

Answers

It should be 8 dollars

5) Jim is hoping that a park will be built
within 5 mi of his house. If a park is
built at the coordinates (12, 10), does
that meet Jim's criteria? Explain.

Answers

Answer:

Step-by-step explanation:

Identify the value of x that makes each pair of ratios
equivalent.
5:15 and x:3 (1 point)
A.5
B.3
C.1

Answers

C
5 is 1/3 of 15 and 1 is 1/3 of 3 so C would be correct

Please help I just need to finish these questions

Answers

Answer:

C

Step-by-step explanation:

Not integer, irrational

The perimeter of a rectangular backyard is 146 feet. It is 40 feet long. How wide is it?

Answers

9514 1404 393

Answer:

  33 ft

Step-by-step explanation:

The perimeter formula for a rectangle is ...

  P = 2(L +W)

Filling in the given numbers, we have ...

  146 = 2(40 +W)

  73 = 40 +W . . . . . . . divide by 2

  33 = W . . . . . . . . . . . subtract 40

The backyard is 33 feet wide.

please answer my question as soon as possible​

Answers

Step-by-step explanation:

<QPR=<PRS (BEING ALTERNATE ANGLE)

<PRS=65

THEN,

45+65+<SRT=180

<SRT=70

A number m is no less than –1 or less than or equal to −5.

Answers

Answer:

-1 < m ≤ - 5

Step-by-step explanation:

Your expression includes: m, -1, -5, >, ≤

m is the value being compared so it will be in the middle.

# sign m sign #

m is no less than -1: no less than means it is greater than -1, but does not include -1. Therefore, our sign is >

m > -1

m is less than or equal to -5. This means we use ≤ because it can equal -5.

m ≤ -5

Now combine the two expressions

m > -1 – This can also be written as -1 < m.

m ≤ -5

-1 < m ≤ - 5

Need help ASAP

which point could represent 5 over 3?​

Answers

Answer:

I think D, I am not sure though

Step-by-step explanation:

Answer:

5/3 is 5÷3 = 1.666666. point C is closest to 1.67.

How did ancient camels differ from those of today?

Answers

Answer:

They Don't

Step-by-step explanation:

me need help on math plz help

Answers

Answer:

4 ;)

Step-by-step explanation:

78/75=1.04

Answer:

It would be A

explanation:

the reson why it is A because it is closest to 3%

your welcome

AB=
Round your answer to the nearest hundredth.
A
20
?
B
3
C

Answers

Answer:

AB= 8.77

AC= 8.24

angle a= 70

Which figures are polygons select each correct answer

Answers

I’m pretty sure it’s Figure A, C, and D

I WILL GIVE YOU 20 POINTS AND MAKE YOU THE BRAINIEST, IF YOU ANSWER THIS CORRECTLY!!!!

The lengths of the diagonals of a rhombus are 4x and 6x. What expression gives the perimeter of the rhombus?

Answers

Answer:

Expression gives the perimeter = 4x√17

Step-by-step explanation:

∵ The diagonals of the rhombus ⊥ to each other and

  bisects each other

∴ Half the longest diagonal = 8x/2 = 4x

∴ Half the shortest diagonal = 2x/2 = x

Use Pythagoras theorem to find the length of the side of the rhombus

∴ The length of the side = √[(4x)² + (x)²] = √[16x² + x²] = √(17x²)

∴ S = x√17

∵ Perimeter of the rhombus = 4 × S

∴ P = 4 × x√17 = 4x√17

Answer:

the correct answer is 4x✓13.

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