Question number 1:
Answer:
Answer B
Step-by-step explanation:
Add the prices
$143.99 + $82.40 = $226.39
Multiply by 6
$226.39 · 6 = $1358.34
Answer B, 1358.34
Answer:X= 1.84. Y= 3.08
Step-by-step explanation:
-9x+8y =8 ............i
-8x+10y= -16........ii
Multiply equation I by 8
Multiply equation ii by 9
-72x+64y = 64 ..... iii
-72x+90y = 144 ..... iv
Subtract iv from iii
-26y = -80
y= 80/26
y= 3.08
Put the value of y in equation i
-9x+8y =8
-9x+8(3.08) = 8
-9x+24.64 = 8
-9x = 8-24.64
-9x=-16.64
Divide both side by 9
-9x/-9 = -16.64/-9
X= 1.84
If you need to write a number as a decimal, it means that you need to write is a an x divided by a power of 10.
you can use this formula:

now let's multiply both sides by 10:

and simplyfy:
(by dividing the first fraction's elements by 5)

change improper fraction into a mixed number

and 1 over 3 is 0.33333...
so the answer is 1.333333 - we can also write it as 1.(3)
In four hours, he drives: = 252
So, Unit rate = 252/4 = 63 mph
In seven hours, it would be = 63 * 7 = 441 miles
Hope this helps!
Answer:

Step-by-step explanation:
Given that,
The base of a triangle = 2 km
The perpendicular height of the triangle = 
We need to find the value of x. It is the Hypotenuse of the triangle. It can be solved as :

So, the value of x is equal to
.