Worth 30 points. Help a homie out

Answers

Answer 1

Answer:

Multiply the second equation by -3 to get -3x - 9y = -30.

Step-by-step explanation:

When eliminating, you need to find a term with the negative of that term to combine so that they cancel each other out. An example would be 3x in the first equation and (-3x) in another equation so that when added, it becomes: 3x-3x = 0.

In the second equation, you see that there is already an x there and you just need to make it become (-3x). Thus, you multiply the entire second equation by -3 to make -3x. Once you have done that, you can combine the two equations and eliminate 3x from the first equation.

3x + 5y = 30

-3x - 9y = -30

3x + 5y -3x - 9y = 30 + (-30)

0 - 4y = 30 - 30

-4y = 0

You can find y and then x later on from here.

Related Questions

Does anyone know how to solve this?

Answers

Answer:

first car : 115 liters

second car: 135 liters

Answer:

car 1 = 173.08 liters

car 2 = 76.92 liters

Step-by-step explanation:

the first step is to find what ratio of car 1 is to car 2

that is 18:8

total ratio is 26

the combination of car 1 and 2 = 26

the total km = 3350

total fuel = 250 liters

car 1 = 18 x 250 liters

= 173.08 liters

car 2 = 8 x 250 liters

= 76.92 liters

173.08 + 76.92 = 250

(2x-3)^2 multiply it

Answers

Answer:

4 x^ 2 − 12 x + 9

Step-by-step explanation:

multiplied the binomials

Answer: 4x^2+12x+9

Step-by-step explanation:

whats the answer giving brainliest:)(:..

Answers

Answer:

Step-by-step explanation:

The answer is C

What is the domain of f(x)=(1/2)^x

Answers

Answer:

x is greater than zero c is correct

I think your answer is A. All real numbers

If 45% of a number is 99 and 35% of the same number is 77, find 80% of that number.

Answers

Answer:

176 = 80% Extra: If you need 100% its, 220

Step-by-step explanation:

99+ 77 is 176

45% + 35% = 80%

HELPPPPPPPP 7TH GRADE

Answers

Answer: 1 gallon

Step-by-step explanation:

Hi there!

Using the equation (12*18)-(7*3), where 12*18 is the area of the wall, 7*3 is the area of the door not being painted, you are left with 196 square ft. of wall. further dividing 196/200 is 0.98, meaning that Mr. Smith will only need one gallon of paint for his wall.

[(12*18)-(7*3)]/200

(215-21)/200

196/200

0.98

0.98 then round to 1

Simplify the following Expression by combining like terms:
y+ 3x + 4y + 2x + 3y + 3x

Answers

Answer:

8x+8y

Step-by-step explanation:

y + 3x + 4y + 2x + 3y +3x

With this we group x with x and y with y and in ascending order so x comes before y

3x+2x+3x

And the y with y

y+4y+3y

Which is;

3x+2x+3x+y+4y+3y

8x+8y

M= i + r ; solve for r

Answers

Answer:

m - i = r

Step-by-step explanation:

In this question, you are solving for "r".

Solve:

M= i + r

We have to get "r" by itself, so subtract "i" from both sides.

m - i = r

Since we found what "r" is, we can't solve any further.

m - i = r would be your answer.

Last week you worked 16 hours, and earned $172.
What is your hourly pay rate?
S
per hour
Give your answer in dollars and cents (like 5.50)

Answers

16X = $172

X = $10.75 dollars per hour

172 ÷ 16 = 10.75

16(10.75) = 172

*X = 10.75*

Describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x).
f(x) = 9 cos x ; g(x) = cos x (3 points)

Answers

Answer:

The transformations required to obtain the graph of the function f(x) from the graph of the function g(x) is vertical stretch

Step-by-step explanation:

We need to describe the transformations required to obtain the graph of the function f(x) from the graph of the function g(x).

We have g(x) = cos x

After transformation we get

f(x)= 9 cos x

According to transformation rule:

if f(x) is transformed into a.f(x) then the transformation is vertical stretch or compression.

if a > 1 then transformation is vertical stretchif 0 < a < 1 then transformation is vertical compression

In our case

g(x)= cos x

f(x) = 9 cos x

a=9 and a>1 so, the transformation is vertical stretch.

So, The transformations required to obtain the graph of the function f(x) from the graph of the function g(x) is vertical stretch

plz help i will report if your not trying to answer

Answers

First one is number 3

Second one is number 2

Answer:

first one is A i think Next one is D i think

Step-by-step explanation:

Papa John's sold 50 pizzas on Monday. Of the pizzas sold, 35 of them were delivered. What percent were delivered?

Answers

Answer:

75%

Step-by-step explanation:

if i'm wrong i'm really sorry-

uh well i did the math and got 70

13. Find the value of x.

Answers

Answer:

6x+12+3x-3=180(supplementary angle)

9x+9=180

9(X+1)=180

X+1=20

X=19

The water level of a river was measured each day during a two-week period. The graph
models the linear relationship between the water level of the river in feet and the number of
days the water level was measured.
Water Level of River
28
24
20
16
Water Level (ft)
12
2
12
6 8 10
Number of Days
Which statement best describes the y-intercept of the graph?
F The water level increased by 0.25 ft per day.
G The maximum water level was 19.5 ft.
The initial water level was 16 ft.
3 The water level was measured for 14 days

Answers

Answer: G, the initial water level was 16 ft

Step-by-step explanation:

I honestly don’t know lol I just looked up the answer on another app

Aaron thinks of two numbers less than 30.
The Highest Common Factor (HCF) of his two numbers is 6.
The Lowest Common Multiple (LCM) of his two numbers is 72.
Write down the two numbers that Aaron is thinking of.

Answers

Answer:

18 and 24

Step-by-step explanation:

HCF(18,24) = 6
LCM(18,24) = 72

4y, 3y terms, coefficients, and constants.

Answers

Answer:

Coefficients= 4, 3

No constants

Only variables x and y

Step-by-step explanation:

Constants could also be found after solving for the variables

use SSS, SAS, ASA, AAS or HL star if the two triangles are congruent, if they are state how you know?

Answers

Answer:HL, ASA, SSS, ASA

Step-by-step explanation:

1. HL because the hypotenuse are equal by the reflexive property and the at least one pair of legs are congruent. Also the interior angles are congruent.

2. ASA because the interior angles are both congruent and the included side is congruent by the reflexive property.

3. SSS because the corresponding sides are congruent and the line is congruent by reflexive property so all the sides are congruent.

4. ASA because the interior angles are congruent and the other pair of angles are also congruent because they are verticle angles. The including sides are also congruent so therefore angle-side-angle.

- The formula for the area of a trapezoid is.... solve for b2

Answers

Answer:

The formula for the area A of a trapezoid is A = 1/2 h(b1 + b2), where h is the height and b1 and b2 are the lengths of the two bases.

Step-by-step explanation:

Area of a trapezoid is found with the formula, A=(a+b)/2 x h

what is 457.894 to 2 deimal places

Answers

Answer:

228.947

Step-by-step explanation:

Answer:

457.894

Step-by-step explanation:

"What is 457.894 rounded to 2 decimal places?" is the same as asking, "What is 457.894 rounded to two decimal points?" or "How to round 457.894 to two decimal places."

The main point is that you want to round 457.894 to two digits or places after the decimal point. Thus, we want to eliminate the last digit in 457.894. To eliminate the last digit in 457.894, we use the following Two Decimal Places Rules to get the answer:

Two Decimal Places Rule #1: If the last digit in 457.894 is less than 5, then remove the last digit.

Two Decimal Places Rule #2: If the last digit in 457.894 is 5 or more and the second to the last digit in 457.894 is less than 9, then remove the last digit and add 1 to the second to the last digit.

Two Decimal Places Rule #3: If the last digit in 457.894 is 5 or more and the second to the last digit in 457.894 is 9, and the third to the last digit is less than 9, then remove the last digit, make the second to last digit 0, and add 1 to the number to the third to the last digit.

Two Decimal Places Rule #4: If the last digit in 457.894 is 5 or more and the second to the last digit is 9, and the third to the last digit is 9, then add 1 to the number on the left side of the decimal point and make the right side of the decimal point 00.

When rounding 457.894 to two decimal places we use Two Decimal Places Rule #1. Therefore, the answer to "What is 457.894 rounded to 2 decimal places?" is:

457.89

whats the domain for the pairs below?

Answers

Answer:

-6

Step-by-step explanation:

when y is -1 the corresponding x value is -6

please help its timed

Answers

Answer:

A.) f(x) = 45 - 4(x - 1)

Step-by-step explanation:

what is 150 percent of 22

Answers

Answer:

it would be 33 i think

150% of 22 is going to be 33.

Which equation best represents the relationship between x and y in the graph?

Answers

show the questions ????

Answer:

whats the picture at

Step-by-step explanation:

The longer leg of a right triangle has a length of 15. One angle in the triangle is 60 degrees. What is the length of the shortest leg?

Answers

The shortest side of a right triangle with a hypotenuse of 15 and one angle of 60° is 7.5

What is an equation?

An equation is an expression that shows the relationship between two or more numbers and variables.

Trigonometric ratio is used to show the relationship between the sides and angles of a right angled triangle.

Given that the longer leg of a right triangle has a length of 15, hence hypotenuse = 15. One angle in the triangle is 60°. Let x represent the shortest side.

The shortest side is adjacent to the 60° angle, hence:

cos(60) = x / 15

x = 7.5

The shortest side of a right triangle with a hypotenuse of 15 and one angle of 60° is 7.5

Find out more on equation at: https://brainly.com/question/13763238

#SPJ1

Answer:

Step-by-step explanation: Took the practice test

5. How much will her total bill be, not including
tax?

Answers

Answer: 8.50

Step-by-step explanation: 10%'s 15% is 1.50 10$-1.50 is 8.50

please help. Multiple choice..

Segment MN has coordinates M(4, -8) and N(6, -3). Segment OP has coordinates O(-5, 9) and P(8, 1). Determine if MN and OP are parallel, perpendicular, or neither. Justify your answer.
A. The segments are parallel because the slopes are the same.
B. The segments are perpendicular because the slopes are opposite reciprocals of each other.
C. The segments are not parallel or perpendicular because the slopes are not the same or opposite reciprocals of each other.
D. The segments are parallel because the slopes are opposite reciprocals of each other.

Answers

The answer for this is A because

What is the slope of the equation 2x - 3y = 6?*
2
-3
2/3
-2/3

Answers

Slope is 2/3, start by changing this equation into slope intercept form and there the slope is 2/3

Please answer this!! I will give you brainlist and 5 stars!

Answers

Answer:

The answer is C

Step-by-step explanation:

3 BC = EF

3 AC = DF

Jen uses 8.6 gallons of gasoline to drive 164.7 miles. Which is the best estimate for the number of miles per gallon of gasoline her vehicle gets?

A.
10 miles per gallon

B.
16 miles per gallon

C.
20 miles per gallon

D.
30 miles per gallon

Answers

Answer:

C 20 miles per gallon.

Have a blessed day

Answer:

c c c c

Step-by-step explanation:

please help, i do not understand this

Answers

Answer:

I believe,

a = -1

b = 3

c = 1/4

Step-by-step explanation:

As most I know that x term is first , y term is second and the term without any variable is 3rd.

(-1x +3y +1/4).

I hope it's correct.

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