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zalisa [80]
3 years ago
7

2x+3y=13 4x-y=-2 Thanks

Mathematics
1 answer:
sergejj [24]3 years ago
5 0

Answer:

2x+3y=13 ------(1)

4x-y=-2 -----(2)

Multiply (1) by 2,

=> 4x + 6y = 26. ---(3)

Subtract (2) from (3),

4x - 4x + 6y + y= 26 + 2

7y = 28

y = 4

x = (13-3(4))/2

x = 1/2.

HOPE IT HELPS!!!

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Which is the equation of a circle with its center at (-4,2) and a radius of 4?
Snowcat [4.5K]

Answer:

(x +4)^2 + (y-2)^2 = 16

Step-by-step explanation:

We can write the equation for a circle with the formula

(x-h)^2 + (y-k)^2 = r^2

Where (h,k) is the center and r is the radius

We know the center is at (-4,2) and the radius is 4

(x- -4)^2 + (y-2)^2 = 4^2

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4 0
3 years ago
Karl is building a rectangular garden bed. The length is 6 feet. She has 20 feet of boards to make the sides. Write and solve an
natali 33 [55]

Answer:

The width of the garden bed must be less than or equal to 4 feet.

w\leq4

Explanation:

Given that;

She has 20 feet of boards to make the sides.

The perimeter of the garden bed must not be more than 20 feet

\begin{gathered} P=2l+2w\leq20 \\ 2l+2w\leq20 \end{gathered}

Given;

The length is 6 feet;

l=6

To get the inequality for the width w, let us substitute the value of the length into the inequality above and simplify;

\begin{gathered} 2l+2w\leq20 \\ 2(6)+2w\leq20 \\ 12+2w\leq20 \\ 2w\leq20-12 \\ 2w\leq8 \\ \frac{2w}{2}\leq\frac{8}{2} \\ w\leq4 \end{gathered}

Therefore, the width of the garden bed must be less than or equal to 4 feet.

w\leq4

8 0
1 year ago
Only do 16 pls help me i will give u brainliest if you help
USPshnik [31]

Answer:

16)  18.5 hours

Step-by-step explanation:

40gifts = 5hrs

40/5 = 8

8gifts = 1hr

148/8 = 18.5

In 18.5 hours, 148 gifts are wrapped.

hope this helps and is right. p.s. i really need brainliest :)

8 0
2 years ago
An equation is shown below:
Alex787 [66]
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add 20 both sides
8x+15=31
subtract 15 both sides
8x=16
divide both sides by the x (8)
x=2
4 0
3 years ago
I need help with all 8!
a_sh-v [17]
1) D
2)
3) B
4 ) F
5)C
6) F
7) D
8) C

I'm not sure about questions 4 and 7, but they may be correct.

I couldn't because I couldn't see the 2nd question
3 0
3 years ago
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