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bogdanovich [222]
3 years ago
8

0.4(2x+1\2)=3[0.2x+(-2)]-4

Mathematics
1 answer:
Dmitry [639]3 years ago
5 0

Answer:

when i solved it ,x=−51

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Heather finished the 12-kilometer race in 2 hours. If Heather kept her pace constant, what was her rate? A. 24 km/hr. B. 14 km/h
andriy [413]

Answer: D, 6km/hr.

Step-by-step explanation:

Heather can finish a 12-kilometer race in 2 hours, and now we have to find how many kilometers she can ride/run at in 1 hour.

How many hours can Heather run in 1 hour? To solve that, we can use the equation 12 ÷ 2.

12 ÷ 2 = 6.

Therefore, if Heather keeps her pace constant, then her rate will be 6km/hr, or D.

7 0
3 years ago
Please help on this one? :)
kirill [66]

Answer:B,C,D


Step-by-step explanation:B- The point is over 1 off the y-axis

C-They are the points the line crosses the x-axis

D- There is no lower point


7 0
3 years ago
X = 10<br><br> x = 2<br><br> x = two divided by five.<br><br> x = 11
KengaRu [80]

Answer:

x = 10

Step-by-step explanation:

You can try the answers to see which works. (The first one does.)

Or, you can solve for the variable:

Divide by 75

... (1/5)^(x/5) = 3/75 = 1/25

Recognize that 25 = 5^2, so ...

... (1/5)^(x/5) = (1/5)^2

Equating exponents, you have

... x/5 = 2

... x = 10 . . . . . multiply by 5

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You can also start by taking logarithms:

... log(75) +(x/5)log(1/5) = log(3)

... (x/5)log(1/5) = log(3) -log(75) = log(3/75) = log(1/25) . . . . simplify the log

... x/5 = log(1/25)/log(1/5) = 2 . . . . . simplify (or evaluate) the log expression

... x = 10 . . . . . multiply by 5

_____

"Equating exponents" is essentially the same as taking logarithms.

5 0
3 years ago
The bottom one Staples has 9 cases of crayons with 1452 boxes in each case
romanna [79]

Answer:

d. 16,092

Step-by-step explanation:

Staples: 1452 x 9 = 13,068

Office Depot: 504 x 6 = 3,024

13,068 + 3,024 = 16,092

3 0
3 years ago
Name a supplementary angle
elena-s [515]

Answer:

60° and 120° are supplementary angles. 93° and 87° are supplementary angles.

They are supplementary angles because they form an 180º angle together.

7 0
3 years ago
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