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maria [59]
3 years ago
15

Need help with this question please

Mathematics
1 answer:
Elan Coil [88]3 years ago
4 0

Answer:

:P

Step-by-step explanation:

:P

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What is the perimeter of this polygon? Round your answer to the nearest<br> tenth
bulgar [2K]

Answer:

A

Step-by-step explanation:

pythagorean theorem

A^2+B^2=C^2 do that for all sides then add

6 0
3 years ago
Read 2 more answers
Bobs mom asked how he Had done on his math test . Bob said if you mupily my score by 3 then subtract 40 from they answer , then
amid [387]
Let bob score =x

according to given condition

(3x-40)/2=100

3x-40=200
3x=240
x=80
so bob score =80
8 0
4 years ago
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What is the solution to 3x -2y =1 and 4y = 7 + 3x
Delvig [45]

Given.

3x-2y=1 (1)

4y=7+3x (2)

Re-arrange equation (2)

(4y=7+3x)-4y

0=-4y+3x+7

(0=-4y+3x+7)-7

-7=-4y+3x

Multiply equation (2) by -1

-1(3x-4y=-7)

-3x+4y=7(3)

Combine like terms and solve.

3x-3x-2y+4y=1+7

2y=8

Divide by (2y) and solve for (y).

\frac{2y}{2}=\frac{8}{2}

y=4

Substitute (y) for equation (1).

3x-2y=1

3x-2(4)=1

3x-8=1

Add (8) to both sides.

(3x-8)+8=(1)+8

3x=9

Divide by (3).

\frac{3x}{3}=\frac{9}{3}

x=3

Check your work.

3x-2y=1

3(3)-2(4)=1

9-8=1

1=1

4y=7+3x

4(4)=7+3(3)

16=7+9

16=16

Your answers is x=3 and y=4

8 0
3 years ago
Which monomials are factors of -21a^2?
pickupchik [31]
There are many pairs you could do, but I'm going to choose this one:
(-3a)(9a)

You can multiply them together, and get (that's how you know if they are factors):
(-3a)(9a) = -21a^2

Hope this helped!
8 0
3 years ago
Read 2 more answers
X^2 - 16x + y^2 - 36=0 what is the center of this circle
ra1l [238]

Answer:

(8, 18)

Step-by-step explanation:

Complete the square twice:

x^2 - 16x + y^2 - 36 = 0

x^2 - 16x + 8^2 + y^2 - 36 + 18^2 = 0 + 8^2 + 18^2

(x-8)^2 + (y-18)^2 = 388

Center: (8, 18)

3 0
3 years ago
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