Answer:
the answer is b. x(< with a line under it) 272
Step-by-step explanation:
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A. 1.395
2.31 - 0.915 = 1.395
To solve this question, let's divide it in parts.
Part 01: "`Product of 7 and the number"
Let's say the unknown number is "a".
So, the product of 7 and "a" is 7a.
Part 02: The sum of -8 and the product of 7 and a number.
Since "the product of 7 and a number" is 7a:
The sum of -8 and 7a is
![-8+7a](https://tex.z-dn.net/?f=-8%2B7a)
Answer:
- 8 + 7a
Using the formula for the perimeter and area of rectangle, the dimensions are: Length = 19 m; width = 9 m.
<h3>What is the Perimeter and Area of a Rectangular Shape?</h3>
Perimeter = 2(length + width)
Area = (length)(width).
Let x represent the length and y the width, therefore:
2(x + y) = 56 --> eqn. 1
xy = 171 --> eqn. 2
Rewrote eqn. 1
x + y = 56/2
x = 28 - y
Substitute x = (28 - y) into eqn. 2
171 = (28 - y)y
171 = 28y - y²
171 - 28y + y² = 0
y² - 28y + 171 = 0
Factorize
(y - 9)(y - 19)
y = 9 and y = 19
Therefore, the dimensions are: Length = 19 m; width = 9 m.
Learn more about the perimeter and area of rectangle on:
brainly.com/question/24571594
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Answer: 360 hours
Step-by-step explanation:
40*5=200
32*5=160
200+160=360 hours