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djverab [1.8K]
3 years ago
9

(05.01 MC)

Mathematics
1 answer:
uysha [10]3 years ago
7 0

Answer:

She would have to save at least 50% of whatever she earns just so she could accomplish her goal.

Step-by-step explanation:

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You Try: Solve for x and y by using elimination. 4x + y = 7 4x - 2y = -2​
salantis [7]

Answer:

\boxed {\boxed {\sf (1, 3) \ or \ x=1 \ and \  y=3}}}

Step-by-step explanation:

We are given this system of equations:

4x+y=7\\4x-2y=-2

We use elimination to solve to eliminate one of the variables, so we only have to work with one at a time. We do this by adding and subtracting the equations, and sometimes multiplying the entire equation by a number.

Notice how both equations have a 4x. This means they can easily be eliminated, without multiplying the equations by another number first. Let's subtract the 2 equations.

\ \ \ 4x+y=7\\ -(4x-2y)=-2

The 4x will cancel because 4x-4x=0.

\ \ \ \ y=7 \\ - (-2y) = -2

Since there are back to back negative signs, they become addition signs.

\ \ \ \ y=7 \\+2y=2

3y=9

We are solving for y , so we must isolate the variable. It is being multiplied by 3 and the inverse of multiplication is division. Divide both sides by 3.

3y/3=9/3\\y=3

Now we can substitute 3 in for y in the original equations. Let's use the first one.

4x+y=7\\4x+3=7

3 is being added to 4x. The inverse of addition is subtraction. Subtract 3 from both sides.

4x+3-3=7-3\\4x=4\\

x is being multiplied by 4. The inverse of multiplication is division. Divide both sides by 4.

4x/4=4/4\\x=1

x is equal to 1 and y is equal to 3. Coordinate points are written as (x, y). The solution to this system of equations is (1, 3).

5 0
2 years ago
What is the sum of the 2nd square number and the 2nd cube number?
hammer [34]

Answer:

17

Step-by-step explanation:

Second square number is 9; 3×3

second cube number is 8; 2×2×2

9+8=17.

8 0
2 years ago
Find the slope of a line parallel to 3x-y=1<br><br> A:3<br><br> B: -1/3<br><br> C: -3<br><br> D: 1/3
kozerog [31]
The answer is A.) 3

♦Brainliest Please ♦

6 0
3 years ago
Read 2 more answers
As figure has an area of 64 squared units which describes the area of the figure after a dialation with a scale factor of 3 over
Nitella [24]

Answer:

112

Step-by-step explanation:

6 0
3 years ago
What pair of factors of -45 has a<br> sum of 4?
damaskus [11]

Answer:

9 and -5

Step-by-step explanation:

9*-5=-45

9+-5=4

5 0
2 years ago
Read 2 more answers
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