Confused on number 10. I put one solution, but I don’t know if it’s right. I got

Mathematics

1 answer:

velikii [3]3 years ago

4 0

4(3x + 12) = -6(-8-2x)
12x + 48 = 48 +12x
12x + 18 = 12x + 48
0 = 0
answer is A. infinitely many solutions

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Find the area of the shaded portion in each of the following

MrRa [10]

Answer:

30.5 cm^2

Step-by-step explanation:

<h3><u>General outline</u></h3>

Find the area of the full circle
Find the area of the rectangle
Find the difference (full circle area - rectangle area)

<h3><u>Step 1. Find the area of the full circle</u></h3>

Recall the formula for the area of a circle: $A_{circle}=\pi r^2$ where $\pi \approx 3.14$ , and "r" is the radius of the circle (distance from center to any point on the edge).

From the diagram, the radius is 5cm.

$A_{circle}=\pi r^2$

$A_{circle}=(3.14)(5[cm])^2$

$A_{circle}=78.5[cm^2]$

<h3><u>Step 2. Find the area of the rectangle</u></h3>

Recall the formula for the area of a rectangle: $A_{rectangle}=bh$ where "b" is the base of the rectangle (length of bottom or length of top), "h" is the height of the rectangle (distance from bottom to top).