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Eduardwww [97]
3 years ago
9

1

Mathematics
2 answers:
Marat540 [252]3 years ago
8 0
<h3>Answer: D) 12.5%</h3>

=================================

Work Shown:

A = old amount = 48

B = new amount = 54

C = percent change

C = [(B-A)/A]*100%

C = [(54-48)/48]*100%

C = [6/48]*100%

C = 0.125*100%

C = 12.5%

The value of C is positive to indicate a percent increase.

So we have a 12.5% increase.

-----------

Note how 12.5% of 48 is 0.125*48 = 6

A 12.5% increase of 48 means we have an increase of 6

So, 48+6 = 54, which matches with what the instructions say. This confirms the answer.

As a shortcut, we could check it by saying 1.125*48 = 54

dalvyx [7]3 years ago
5 0

Answer:

12.5%

Step-by-step explanation:

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If tile costs $8.50 per square foot, how much does it cost per inch?
Sphinxa [80]

Answer:

$0.06 per square inch

Step-by-step explanation:

The question should be:

<em>"If tile costs $8.50 per square foot, how much does it cost per square inch?"</em>

<em />

To solve this, we basically need a conversion from feet to inches. BUT 2 times, since we are talking about "square feet" and "square inches".

We know 1 feet = 12 inches

Also, since we are going from square feet to square inches [big to small], we have to divide TWICE.

Thus, we will have:

\frac{8.5}{12*12}

We are dividing 8.5 (the cost) by 12, 2 times since we want square feet in square inches. The answer is:

\frac{8.5}{12*12}=0.06

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6 0
3 years ago
An employee receives a weekly salary of $340 and a 6% commission on all sales.
Alina [70]
340+.06(sales)
340+.06(660)

$379.60
5 0
3 years ago
Consider the two expressions 4b(b+1) and (2b+7)(2b-8). Compare their values if b=-3, b=-2, and if b=10. Is it true that for an v
noname [10]

Answer:

If b=-3 then the first expression is equal to 24 and the second expression is equal to -14.

If b=-2 then the first expression is equal to 8 and the second expression is equal to -36.

If b=10 then the first expression is equal to 440 and the second expression is equal to 324.

Yes, it is true.

Step-by-step explanation:

b=-3:

4b(b+1)=4(-3)(-3+1)=-12(-2)=24

(2b+7)(2b-8)=(2(-3)+7)(2(-3)-8)=(-6+7)(-6-8)=1(-14)=-14

b=-2:

4b(b+1)=4(-2)(-2+1)=-8(-1)=8

(2b+7)(2b-8)=(2(-2)+7)(2(-2)-8)=(-4+7)(-4-8)=3(-12)=-36

b=10:

4b(b+1)=4(10)(10+1)=40(11)=440

(2b+7)(2b-8)=(2(10)+7)(2(10)-8)=(20+7)(20-8)=27(12)=324

8 0
3 years ago
Determine which lines in the diagram are parallel. A) a || b B) b || c C) a || c D) b || d
spayn [35]

Line a and line c are parallel lines that are given as a || c. Then the correct option is C.

<h3>How are parallel straight lines related?</h3>

Parallel lines have the same slope since the slope is like a measure of steepness and since parallel lines are of the same steepness, thus, are of the same slope.

Since the given parallel line has equation y = 2x + 2, thus its slope is 2 and thus, the slope of the needed line is 2 too.

Then we have

The distance between line a and line c is constant. Then line a and line c are parallel lines.

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Learn more about parallel lines here:

brainly.com/question/13857011

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7 0
2 years ago
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the formula for area of a parallelogram is base times height

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