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3 years ago

How do i do this problem x = 16 - 4y 3x + 4y = 8

Mathematics

1 answer:

iVinArrow [24]3 years ago

7 0

Answer:

Because you know the equation for what x equals, you can plug that equation into the x of the second equation.

For example: 3(16-4y)+4y=8.

Then you can solve for y. After you find y, you will plug that number into the original equation (x=26-4y) and solve for x.

Step-by-step explanation:

You might be interested in

Lines MN and PQ are parallel. Lines RS and TV intersect them. Which statements are true about these lines? Check all that apply.

Maru [420]

The correct answer is: 
RS is perpendicular to MN and PQ.

Explanation: 
We can use the slopes of these lines to determine the answer.
Slope is given by the formula 
m= $\frac{y_{2}- y_{1} }{ x_{2} - x_{1} }$ .

Using the coordinates for M and N, we have: 
m= $\frac{3--1}{3--3} = \frac{4}{6} = \frac{2}{3}$ .

Since PQ is parallel to MN, its slope will be $\frac{2}{3}$ as well, since parallel lines have the same slope.

Using the coordinates for points T and V in the slope formula, we have 
m= $\frac{-4-1}{0--4} =- \frac{5}{4}$ .

This is not parallel to MN or PQ, since the slopes are not the same.
We can also say that it is not perpendicular to these lines; perpendicular lines have slopes that are negative reciprocals (they are opposite signs and are flipped). This is not true of TV either.

Using the coordinates for R and S in the slope formula, we have 
m= $\frac{-2-1}{2-0} =- \frac{3}{2}$ . Comparing this to the slope of RS, it is flipped and the sign is opposite; they are negative reciprocals, so they are perpendicular.

7 0

4 years ago

Read 2 more answers

8,185,000,000 as a scientific notations

Irina-Kira [14]

Answer:

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the

10. If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

8.185 × 10^9

4 0

3 years ago

Wazi has sixty three 5 $ bills he takes the 5 $ bills to bank to exchange for 20$ how many 20$ bills does Wes I get

dmitriy555 [2]

15

63 x 5 = 315
315/20 = 15.75
hence, 15 $20 bills

4 0

4 years ago

A bird was sitting 12 feet from the base of an oak tree and flew 20 feet to reach the top of the tree. How tall is the tree?

BARSIC [14]

Answer:

It should be 12+20= 32 ft

Step-by-step explanation:

7 0

3 years ago

It takes 3600 person hours to complete a project. How many weeks will it take a team of 15 people to complete the job if each pe

kherson [118]

Answer:

6 weeks

Step-by-step explanation:

x = # of weeks

15 times 8 times 5 = 1 week,

so 15 times 8 times 5 times x = 3600 is the equation

Solve for x to get x = 6

6 0

3 years ago