2 years ago

PLEASE HELP I WILL MARK YOU BRAINLIEST FIND THE AREA OF NUMBER 3 AND 4

Mathematics

2 answers:

scoray [572]2 years ago

8 0

Answer:

3. 112.2 yd

4. 30m

Step-by-step explanation:

Number 3:

L × W (length × width) = A
18.7 × 6 = 112.2 yd

Number 4:

B × H (base × height) = A
6 × 5 = 30 m

I hope this helps!

sdas [7]2 years ago

8 0

Answer:

3. The formula to find the area of a rectangle is l * w. 18.7 * 6 = 112.2 yards^2.

4. The formula to find the area of a parallelogram is base * height. 6*5 = 30 m^2.

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Step-by-step explanation:

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The area of a rectangle is 27 m^2 , and the length of the rectangle is 3 m less than twice the width. Find the dimensions of the

vagabundo [1.1K]

Let $L$ be the length of the rectangle and $W$ be the width. In the problem it is given that $L=2W-3$ . It is also given that the area $LW=27$ . Substituting in the length in terms of width, we have $W(2W-3)=27 \\ 2W^2-3W-27=0 \\ (2W-9)(W+3)=0$ . Using the zero product property, $2W-9=0 \text{ or } W+3=0$ . Solving these we get the width $W=4.5 \text{ or } -3$ . However, it doesn't make sense for the width to be negative, so the width must be $\boxed{4.5 \text{ m}}$ . From that we can tell the length $L=2(4.5)-3=\boxed{6 \text{ m}}$ .