Question

i got a ACT test study and i need help with some of it reply if u are willing to help

Answer 1

car A averages 16 miles a gallon car B average 35 miles a gallon at this rate how much more gallons will car A and B need to make a 1120 mile trip

Answer 2

if you multiply 1120 miles by the ratio of gallons/mile , you will get gallons
in other words, car A will use \( 1120\ miles \cdot \frac{1\ gallon}{16 miles} \)
and car B will use \( 1120\ miles \cdot \frac{1\ gallon}{35 \ miles} \)
and the difference is
\[ 1120 \cdot \frac{1}{16 }- 1120 \cdot \frac{1}{35 } \]

Answer 3

thx so helpful

Answer 4

if you don't have a calculator you can do the division in steps
(it helps to know some "rules"
see https://en.wikipedia.org/wiki/Divisibility_rule)
for example, 16 is 4*4
divide 4 into 1120 to get 280
then divide that by 4 to get 70
we have
70 - 1120/(5*7)

Answer 5

the intergers below adds up to 390
x-3
x-2
x-1
x
x+1
what is the value of x

Answer 6

if you add them up (use algebra) what do you get ?

Answer 7

-55

Answer 8

first add up the x's. how many x's do you have?

Answer 9

5

Answer 10

for example x+x is 2x

when you add up the x's you get 5x (not just 5)
now add up the numbers. what do you get ?

Answer 11

5x-3-2-1+1?

Answer 12

yes, but you can simplify the numbers and get just 1 total for the numbers

Answer 13

in other words do -3-2 -1+1

Answer 14

-5?

Answer 15

yes. all of that means
the sum of the "x stuff" is
5x-5

and they say they add up to 390

we can say
5x-5= 390

add 5 to both sides
5x-5+5 = 390+5
and simplify.
what do you get ?

Answer 16

on the left side you have -5+5 which adds to 0
so 5x+0 on the left
but adding 0 does nothing, so we can just say
5x= 390+5

what do you get on the right side?

Answer 17

x=79?

Answer 18

yes

Answer 19

5x= 395
divide both sides by 5
x= 395/5 = 79

Answer 20

ight thanks and is it ok if i message u tomarrow for more help if i need it

Answer 21

yes