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Ulleksa [173]
3 years ago
6

Angel has $60 and his sister has $120. Angel saves $7 per week, and his sister saves $5 per week. Which equation and solution re

present the number of weeks, w, it will take for the siblings to have the same amount of money?
A. 7w + 60 = 5w + 120; w = 30

B. 60w + 7 = 120w + 5; w = 30

C. Not here

D. 7w - 60 = 5w - 120; w = 30
Mathematics
2 answers:
dusya [7]3 years ago
7 0

Answer:

9 weeks

Step-by-step explanation:

borishaifa [10]3 years ago
6 0

Answer:

A. 7w + 60 = 5w + 120; w = 30

Step-by-step explanation:

  • 60 + 7x = 120 + 5x
  • 7x - 5x = 120 - 60
  • 2x = 60
  • x = 30
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Yuki888 [10]

$ 3042

Explanation

we need to use the formula:

\begin{gathered} A=P(1+r)^t \\ \text{where} \\ \text{ P is the principal} \\ r\text{ is the rate ( in decimal)} \\ t\text{ is the time} \end{gathered}

Step 1

a)let

\begin{gathered} P=2500 \\ r=\text{ 4\% =}\frac{4}{100}=0.04 \\ r=0.04 \\ t=5\text{ ( years)} \end{gathered}

b) now, replace

\begin{gathered} A=P(1+r)^t \\ A=2500(1+0.04)^5 \\ A=2500(1.04)^5 \\ A=2500(1.2166) \\ A=3041.63 \\ \text{rounded} \\ A=3042 \end{gathered}

therefore, the answer is

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8 0
1 year ago
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Dovator [93]

Answer:

-1

Step-by-step explanation:

5 0
2 years ago
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The cost (in dollars) of making b bracelets is represented by 4 5b. The cost (in dollars) of making b necklaces is represented b
Leviafan [203]

Answer:

$(3b+2)

Step-by-step explanation:

The cost of making b bracelets = 4+5b

The cost  of making b necklaces = 8b+6.

To determine how much more it cost to make b necklaces than b bracelets, we simply subtract.

Extra Cost = Cost of b Necklaces-Cost of b Bracelets

=(8b+6)-(4+5b)

open the brackets

=8b+6-4-5b

Collect like terms

=8b-5b+6-4

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It costs $(3b+2) more to make b necklaces than b bracelets.

3 0
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kozerog [31]

Answer:

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Step-by-step explanation:

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From this we are able to work out the number that will have defects. This is because we know that 75 goes into 450 6 times and that for each 75 phones there will be 3 defects. So to work out the number of phones out of 450 that would be defects you would simply multiply 3 by 6, this gives you 18. This shows that out of 450 phones 18 of them will have a defect.

1) Divide 450 by 75.

450/75=6

2) Multiply 6 by 3.

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