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3 years ago

Dave can drive 160 miles on a tank of gas. Approximately how many tanks of gas will he need to drive 880 miles?

2 answers:

8 0

How many times does he have to drive 160 miles in order to cover 880 ?

880/160 = 5.5 times

He'll need 5 complete tanks of gas, and 1/2 of another one.

stellarik [79]3 years ago

4 0

$160\ miles\ \rightarrow\ \ 1\ tank\ of\ gas\\880\ miles\ \rightarrow\ x\\\\160\cdot x=880\ /:160\\\\x= \frac{880}{160} \ \ \ \Rightarrow\ \ x= \frac{11}{2} \ \ \ \Rightarrow\ \ x= 5.5\\\\Ans.\ 5.5\ tank\ of\ gas$

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Help Please, anyone good at domain values of composite functions.

Delicious77 [7]

Answer:

second choice

Step-by-step explanation:

$(f \circ g)(x) =$

$= f(g(x))$

$= f(-7x + 7)$

$= \sqrt{-7x + 7 + 3}$

$= \sqrt{-7x + 10}$

Let x = 5:

$(f \circ g)(5) = \sqrt{-7(5) + 10}$

$(f \circ g)(5) = \sqrt{-35 + 10}$

$(f \circ g)(5) = \sqrt{-25}$

Since using x = 5 gives the square root of a negative number, 5 is not in the domain of the composition of the functions.

Answer: second choice

3 0

3 years ago

1. Which other expression has the same value as (-14) - 8?

ludmilkaskok [199]

Answer: −22

Step-by-step explanation:

=−14−8

=−14+−8

=−22

6 0

2 years ago

What are the prime factors of 625

kobusy [5.1K]

Let's see what we can get by dividing 625 by 5, as it ends with a 5:
625/5 = 125
So we have 5 as one of our factors. Let's divide again by 5:
125/5 = 25
Our current prime factors now are 5 and 5, but we aren't finished. Divide again by 5:
25/5 = 5
Now we know that the prime factorization of 625 is 5 * 5 * 5 * 5, which can also be shown as 5⁴.

6 0

3 years ago

Abby used the quadratic formula to find the zeros of the

MArishka [77]

Step 2: She did not simplify under the square root correctly

under the square root:

(-6)^2 =36

and -4(5)(-8) =160

therefore under the square root it needs to be square root of 36+160 which is square root of 196.

That answer is 14 when square rooted