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Alex Ar [27]
4 years ago
15

Evaluate xy-(-2z) for x=10, y=2, and z=-3. a. 6 b. 26 c. 16

Mathematics
2 answers:
Karo-lina-s [1.5K]4 years ago
6 0

B. 26

10*2-(-2*-3)

20-(-2*-3)

20-6

14

Paul [167]4 years ago
5 0

(10)(2)-(-2)(-3)

20-6

14

I feel I did this right but its not matching to the answer choices. Does it give anymore information?

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4y + x = 12, 2x = 24 - 8y<br> Solve by Substitution
Ann [662]

Answer: Undefined

Step-by-step explanation:

4y+x=12, 2x=24-8y

Isolate x by subtracting 4y

4y+x=12

x=12-4y

Plug the equation for x in to anywhere you see the variable x in the other equation

2(12-4y)=24-8y

Distribute 2

24-8y=24-8y

Get the variables on one side so add 8y (cancels out)

24=24

Can’t solve its undefined

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3 years ago
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sp2606 [1]

Answer:

5/12

Step-by-step explanation:

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kumpel [21]

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Step-by-step explanation:

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3 years ago
Use the distance formula to find the perimeter. Round to the nearest tenth.
Ierofanga [76]

Answer:

37.6 units

Step-by-step explanation:

Perimeter = sum of all sides of the triangle

To find the sum, find the distance between each points.

✔️Distance between points (-7, 6) and (5, -4):

d = \sqrt{(x_2 - x_1)^2 + (y_2 - y_1)^2} =

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= \sqrt{144 + 100}

= \sqrt{244} = 15.6 units (nearest tenth)

✔️Distance between (-7, 6) and (-7, -4):

|6 -(-4)| = 10 units

✔️Distance between (-7, -4) and (5, -4)

|-7 - 5| = 12 units

✔️ Perimeter = 15.6 + 10 + 12 = 37.6 units

6 0
3 years ago
The graph of the function, f, is shown. What is the domain of f?
pentagon [3]

Answer:

D : [-2,0) U (0, infinity) ; -2<=x<0 U x>0

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