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Valentin [98]
2 years ago
15

PLEASE HELP ASAP!!!!!

Mathematics
1 answer:
Aleks [24]2 years ago
4 0

Answer:

$8.00 for the unit rate

it would cost $144.00 to buy 18 copies

Step-by-step explanation:

for the first one, multiply 40x20= $8.00

then multiply $8.00 by 18 copies and get $144.00!

Please mark brainliest!!!

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What is the percent decrease of 80 to 64
devlian [24]
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The fraction of decrease is the fraction of the original amount that disappeared.

That fraction is      (16 / 80)  =  1/5  =  0.2

To change a decimal to a percent,
move the decimal point 2 places that way ==> .

                             0.2  =  20%
6 0
3 years ago
Somebody help me:( i’ll give you brainliest (geometry)
Vadim26 [7]
I would need a picture of the angle to the right to solve it
4 0
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How do I solve #7? do i add all the angles together like a normal triangle and make it equal to 180?
kobusy [5.1K]

Answer:

126 degrees

Step-by-step explanation:

Triangle: y = 180 - (5x + 4x)

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5x + 4x = 4x + 30

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7 0
2 years ago
Subtract: (b^2 + 9 ab + 5a ) - ( 3b^2 -25ab + 1)
Brrunno [24]

Answer:

- 2b^2 + 34ab + 5a - 1

Step-by-step explanation:

<em>here's</em><em> your</em><em> solution</em>

<em>=</em><em>></em><em> </em><em>(</em><em>b^</em><em>2</em><em> </em><em>+</em><em> </em><em>9</em><em>a</em><em>b</em><em> </em><em>+</em><em> </em><em>5</em><em>a</em><em>)</em><em> </em><em>-</em><em> </em><em>(</em><em>3</em><em>b</em><em>^</em><em>2</em><em> </em><em>-</em><em> </em><em>2</em><em>5</em><em>a</em><em>b</em><em> </em><em>+</em><em> </em><em>1</em><em>)</em>

<em>=</em><em>></em><em> </em><em>b^</em><em>2</em><em> </em><em>+</em><em> </em><em>9</em><em>a</em><em>b</em><em> </em><em>+</em><em> </em><em>5</em><em>a</em><em> </em><em>-</em><em> </em><em>3</em><em>b</em><em>^</em><em>2</em><em> </em><em>+</em><em> </em><em>2</em><em>5</em><em>a</em><em>b</em><em> </em><em>-</em><em> </em><em>1</em>

<em>=</em><em>></em><em> </em><em>-</em><em> </em><em>2</em><em>b</em><em>^</em><em>2</em><em> </em><em>+</em><em> </em><em>3</em><em>4</em><em>a</em><em>b</em><em> </em><em>+</em><em> </em><em>5</em><em>a</em><em> </em><em>-</em><em> </em><em>1</em>

<em> </em><em> </em><em> </em><em> </em>

<em> </em><em> </em><em>hope</em><em> it</em><em> helps</em>

6 0
2 years ago
Keith works 8 hours per day for 5 per week. melba works 2,250 minutes each week. who spends more time at work
Orlov [11]

Answer:

Keith does.

Step-by-step explanation:

2250/60=37.5

8*5=40

Keith spends 40 hrs at work Melba spends 37.5 hrs.

6 0
3 years ago
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