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navik [9.2K]
3 years ago
11

Solve the system of equations using substitution.

Mathematics
2 answers:
TEA [102]3 years ago
6 0
I think the answer is C
Lunna [17]3 years ago
5 0
See attached picture for answer:

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0.00000003 in scientific notation
tester [92]

Answer:

3×10x^{-8}

Step-by-step explanation:

0.00000003

Move the decimal so there is one non-zero digit to the left of the decimal point. The number of decimal places you move will be the exponent on the  

10 . If the decimal is being moved to the right, the exponent will be negative. If the decimal is being moved to the left, the exponent will be positive.

6 0
3 years ago
David goes into a candy store with $5.00. He buys 9 peppermints for $0.15 each and some sour candies. Each sour candy costs $0.2
Agata [3.3K]

Answer:

5 ≥ 9*.15 + x*.25

He can buy up to 14 candies

Step-by-step explanation:

Total money ≥number of peppermints * cost per peppermint + number of sour candies * cost per sour candy

We know he has 5 dollars.  He bought 5 peppermints at $.15 cents each and x sour candies at $.25 each

Substituting in

5 ≥ 9*.15 + x*.25

5≥1.35 + .25x

Subtract 1.35 on each side

5-1.35 ≥ 1.35-1.35+.25x

3.65≥.25x

Divide by .25 on each side

3.65/.25 ≥ .25x/.25

14.6 ≥ x

He can buy up to 14 candies.  You can't buy part of a candy

6 0
3 years ago
It hard I need help can y’all help me plz
KatRina [158]

Answer:

we dont have a question or picture..?

7 0
3 years ago
Find the mean of the data set. If necessary, round to the nearest tenth. 18 14 8 22 25 8 A. 15.8 B, 14.8 C.16.1 D.17.3
madreJ [45]
To find the mean you add all the numbers then divide by the amount of numbers there are so it would be 18+14+8+22+25+8=95 then divide 95 by 6. You get 15.8333333 the answer is A
4 0
4 years ago
Read 2 more answers
Please help out with this question..
Sophie [7]

Answer:

Step-by-step explanation:

C = 16 * 3 = 48

8 0
3 years ago
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