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ElenaW [278]
2 years ago
13

Which of the following represents the area of a rectangle whose length is 5x − 3 and whose width is x + 7?

Mathematics
1 answer:
Nookie1986 [14]2 years ago
4 0

Answer : option C, 5x2 + 32x − 21

In the rectangle, the length = 5x - 3 and width = x + 7

We know the formula for area of rectangle = length * width

Area of rectangle = (5x-3)(x+7)

WE multiply it using FOIL method

F - First terms, 5x * x = 5x^2

O- Outer terms, 5x * 7 = 35x

I - Inner terms, -3 * x= -3x

L - Last terms, -3 * 7 = -21

Now we add all the terms

5x^2 +35x -3x -21

combine like terms

5x^2 +32x -21

So area of a rectangle = 5x^2 +32x -21

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Pavel [41]

Answer:

the correct answer should be C

Step-by-step explanation:

hope this helps you

3 0
2 years ago
What is 90% of $634?
stiks02 [169]
$570.60 because 90/100=.90 so multiply that with 634 with .90 you get 570.60
6 0
3 years ago
Read 2 more answers
17 points if you know. Help please
vovangra [49]

Answer:

Step-by-step explanation:

Angles 153 and QRP are straight angles, and thus Angle QRP is

180 - 153, or 27 degrees.

The interior angles of the triangle must sum up to 180 degrees:

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combining like terms, we get:

5y - 25 = 180, or 5y = 155, or y = 31

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2 years ago
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4 0
3 years ago
Solve the equation.<br><br>5/7=10/x+2​
skelet666 [1.2K]

Answer:

x=-\frac{70}{9}

Step-by-step explanation:

Isolate the variable by doing operations to both sides of the equation.  

The work is shown below:

\frac{5}{7} =\frac{10}{x} +2\\\\\frac{5}{7} - 2=\frac{10}{x} +2 - 2\\\\-\frac{9}{7} = \frac{10}{x}\\\\ -\frac{9}{7}*x = \frac{10}{x}*x\\\\ -\frac{9}{7}x = 10\\\\ -\frac{9}{7}x * (-\frac{7}{9})= 10 * (-\frac{7}{9}) \\\\x=-\frac{70}{9}

6 0
3 years ago
Read 2 more answers
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