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Dmitry_Shevchenko [17]
3 years ago
9

A self-serve car wash charges $5.34 to use its facilities, plus an additional $0.78 for each minute the customer is at the self-

serve car wash. If Tiffany was at the car wash for 5 minutes, how much was she charged?
Mathematics
2 answers:
oee [108]3 years ago
8 0
At the car wash, Tina was charged $9.24
For 5 minutes.
erma4kov [3.2K]3 years ago
3 0

T = 5.34 + 0.78m

T = 5.34 + 0.78 * 5

T = 5.34 + 3.9

T = 9.24

Tina was charged $9.24 at the car wash for 5 minutes.

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A submarine descended 3 feet per minute.If the surface of the water is 0, which integer describes the position of the submarine
marin [14]

Answer:

-24

Step-by-step explanation:

-3*8=-24

8 0
3 years ago
Which expression is equivalent to 5 x + 10 y minus 15?
BlackZzzverrR [31]

Answer:

C

Step-by-step explanation

5*x=5x -----5*2=10------5*3=15

7 0
3 years ago
How do you solve 4.75 times 2.2
Serga [27]

Answer:

10.45

Step-by-step explanation:

To solve it without the calculator:

First, you multiply 4.75 times 0.2    (0.95)

Then you multiply 4.75 times 2       (9.5)

Then you add the 2 numbers to get the answer.

0.95 + 9.5 = 10.45

With the calculator, just put in the 2 numbers and click enter!

7 0
3 years ago
2. Determine the sum of the first 400 ODD numbers.<br><br>​
il63 [147K]

Odd numbers take the form 2n-1, where n\ge1 is an integer. When n=400, the last odd number would be 799. So we're adding

S=1+3+5+\cdots+795+797+799

By reversing the order of terms, we have

S=799+797+795+\cdots+5+3+1

and we can pair up terms in both sums at the same position to write

2S=(1+799)+(3+797)+(5+795)+\cdots(795+5)+(797+3)+(799+1)

so that we are basically adding 400 copies of 800, and from there we can find the value of the sum right away:

2S=400\cdot800\implies S=160,000

###

We could also make use of the formulas,

\displaystyle\sum_{i=1}^n1=n

\displaystyle\sum_{i=1}^ni=\dfrac{n(n+1)}2

We have

S=\displaystyle\sum_{i=1}^{400}(2i-1)=2\sum_{i=1}^{400}i-\sum_{i=1}^{400}1=400(400+1)-400=400^2=160,000

3 0
3 years ago
A man invests $8 000 at 12% simple interest for 3 years. If he invests the same amount of money for the same time period at 12%
AleksandrR [38]

Answer:

  $359.42

Step-by-step explanation:

The difference in the investment values can be computed by making use of the formulas for the account balance in each case.

  compound interest: A = P(1 +r)^t . . . . interest at rate r compounded annually

  simple interst: A = P(1 +rt) . . . . simple interest at rate r

__

The account earning simple interest will have a balance of ...

  A = $8000(1 +0.12×3) = $10,880

The account earning compound interest will have a balance of ...

  A = $8000(1 +0.12)^3 ≈ $11,239.42

The difference between the two investments is ...

  $11,239.42 -10,880 = $359.42

5 0
1 year ago
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