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mr_godi [17]
3 years ago
10

At a museum shop, Alysa bought two books for $28.50 and some cards for $3.25 each. Her total purchase came to $44.75. How many c

ards did she
buy
Mathematics
1 answer:
defon3 years ago
5 0

Answer:5

Step-by-step explanation:

44.75-28.50=16.25

16.25/3.25=5

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Math help questions <br>​
Evgen [1.6K]

After 1 year, the initial investment increases by 7%, i.e. multiplied by 1.07. So after 1 year the investment has a value of $800 × 1.07 = $856.

After another year, that amount increases again by 7% to $856 × 1.07 = $915.92.

And so on. After t years, the investment would have a value of \$800 \times 1.07^t.

We want the find the number of years n such that

\$856 \times 1.07^n = \$1400

Solve for n :

856 \times 1.07 ^n = 1400

1.07^n = \dfrac74

\log_{1.07}\left(1.07^n\right) = \log_{1.07}\left(\dfrac74\right)

n \log_{1.07}(1.07) = \log_{1.07} \left(\dfrac74\right)

n = \log_{1.07} \left(\dfrac74\right) = \dfrac{\ln\left(\frac74\right)}{\ln(1.04)} \approx \boxed{8.3}

4 0
2 years ago
Read 2 more answers
William,Jan and Greg have a total of $26. Greg has the most money. Jan has twice as much money as William. Greg has $11 dollars.
Alexeev081 [22]

Answer:

$10

Step-by-step explanation:

Greg's amount of money =  $11

26-11 = 15 =  

Jan's amount of money = $10

William's amount of money = $5

5x2 = 10

6 0
3 years ago
What is the resulting ordered pair if the value of the independent variable is 5?
eduard
F(5) = -2 * 5 + 1 = -9
the pair is (5, -9)
6 0
3 years ago
2. Given: g(x) = x2<br> What is g(4) = ?<br> 4<br> 0<br> 16<br> 49
Fed [463]

Answer:

16

Step-by-step explanation:

Simply plug 4 into g(x)

g(x) = x^2

g(4) = (4)^2 = 16

4 0
3 years ago
A bag contains 63 marbles, some white and some green. The ratio of white marbles to green ones is 2:7.
Jet001 [13]

Answer:

2:7 = 14:59

Step-by-step explanation:

2 + 7 = 9

63 divided by 9 = 7

Get the 2 from "2:7"

2 x 7 = 14

Get 7 from "2:7"

7 x 7 = 49

7 0
2 years ago
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