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Sauron [17]
3 years ago
14

Use a table to multiply (–5a)(2a – 1). A) –15a B) 5a2 + 10a C) –10a2 – 5a D) –10a2 + 5a

Mathematics
1 answer:
Varvara68 [4.7K]3 years ago
8 0

Answer:

<h3>-10a² + 5a</h3>

Step-by-step explanation:

Given the expression (–5a)(2a – 1)

Open the bracket

(–5a)(2a – 1)

= -5a(2a) -5a(-1)

= -10a² + 5a

<em>hence the equivalent expression is -10a² + 5a</em>

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Julie makes and sells shirts for children and adults. She sells the shirts for $20 per unit. Material for
Alisiya [41]

Answer:

Julie need to sell at least 45 shirts to break even.

Step-by-step explanation:

The  selling cost of each shirt = $ 20

Cost of each shirt = $6

The fixed cost per month = $420

Number of shirts she can make = 80

Hence, the <u>cost of making 80 shirts</u> =  80 x $6  = $480

So, her total capital investment of the month

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Now, let us assume she sell k number of shirts.

⇒ $20 x k  = $900

or, k = 900 / 20 = 45

or, k = 45

Hence, Julie need to sell at least 45 shirts to break even.

6 0
2 years ago
Jack earns $40 in interest each year on an investment. What is his interest rate if his principal was $200
Fudgin [204]

Answer:

The interest rate is 20%.

Step-by-step explanation:

In order to calculate the interest rate, we need to compute how many percents the value he recieves is related to the total he invested. In this case he recieves 40 every year and he invested 200, to calculate that we will apply a rule of three. We have:

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200/40 = 100/x

200*x = 40*100

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8 0
2 years ago
What is the midpoint of the line segment with endpoints at (12,7)and (18,19)
Mrac [35]

Answer:

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Step-by-step explanation:

Midpoint is the half of the segment.

What I did to solve this was adding the two xs together to get 30 then find the average of 30 by dividing it by 2. This would give you 15

I did the same thing with the ys and got 13

hope this made sense

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3 years ago
A rectangle has a width of 7. 9 ft and a perimeter of 27. 2 ft.
antiseptic1488 [7]

Answer:

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2 years ago
Ricardo earns $25 allowance each week. How can she mentally compute her total earnings after 7 weeks?
dexar [7]

Answer:

7*25= (25*4)+(25*3)=$175

Step-by-step explanation:

Expand equation

8 0
2 years ago
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