2 years ago

Multiply -4x^-2y(2yx^3+6xy^3-3y^3x4)

Mathematics

1 answer:

Alenkinab [10]2 years ago

8 0

Answer:

below here hopes it helps!

Step-by-step explanation:

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Please can someone help me?

Debora [2.8K]

If the perimeters are equal, you can form an equation to find x:
x + x + 12 + x + x + 12 = x + 11 + x + 11 + x + 16
4x + 24 = 3x + 38
- 3x
x + 24 = 38
- 24
x = 14
Now you can substitute the x value into the perimeter:
(4 × 14) + 24
56 + 24 = 80 cm

(3 × 14) + 38
42 + 38 = 80 cm

So the perimeter would be 80 cm.
I hope this helps!

6 0

2 years ago

The 200 meter race times at a state track meet are normally distributed with a mean of 13.56 seconds and a standard deviation of

BaLLatris [955]

Answer:

A. 0.4880

Step-by-step explanation:

First, find the z-score:

z = (x − μ) / σ

z = (13.5 − 13.56) / 2.24

z = -0.03

Using a z-score table: