3 years ago

(help) Evaluate the expression 9y - 4(4) + y3 when y = 2.

Mathematics

1 answer:

romanna [79]3 years ago

4 0

Answer:

9y - 4(4) + y³= 18-16+8=10

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A park is in the shape of a rectangle. The park authorities are planning to build a 2-meter-wide jogging path in the park (shown

Burka [1]

First, we need to find the area of the two rectangles in this picture. We know that area = l*w.

So for the larger rectangle, we know the l = 100 m, and the w = 60 m. Let us find the area:

$A=100*60=6000 m^{2}$

So the larger rectangle area is 6000 m.

The smaller rectangle has dimensions that are 2 m less on every side. So we can recalculate these dimensions as l = 96 m and w = 56 m.

Let's find the area of the smaller rectangle:

$A=96*56=5,376 m^{2}$

So we know that the area of the smaller rectangle is 5,376 m.

The area of the jogging path is going to be the difference between these two rectangles. Let us solve:

$6,000-5,376=624 m^{2}$

So now we know that the area of the jogging path is $624 m^{2}$ .