Answer:
8.1
Step-by-step explanation:
2x^2 -9 = 121
+9 +9
2x^2 = 130
/2 /2
x^2 = 65
x= sqrt (65)
x= 8.06225...
x = 8.1
The length of the arc =R × theta
theta =the length of the arc /R
theta =16/19.36
that's what i know
Answer:
r = 9 that's your answer.
Hope it's correct, appreciate if you could let me know
Step-by-step explanation:
Answer:
The price of having her car detailed before tax = $55
Step-by-step explanation:
She pays the cashier with a $100 bill and gets $40.60 in change.
She paid = $100 - $40.60
= $59.40
Sales tax = 8%
what was the price of having her car detailed before tax?
Let x= price of having her car detailed before tax
8% of x + x = $59.40
(0.08 * x) + x = $59.40
0.08x + x = 59.40
1.08x = 59.40
Divide both sides by 1.08
x = 59.40 / 1.08
x = $55
Therefore, the price of having her car detailed before tax is $55
Check:
8% of $55
= 0.08*55
= $4.40
Tax + price before tax
$4.40 + $55
= $59.40
Answer:
5 men should be subtracted.
Step-by-step explanation:
This question is solved by proportions, using a rule of three.
As these measures(number of men needed and time) are inversely proportional, we multiply the lines instead of cross multiplication.
How many men should be working to complete the work in 32 days?
20 men - 24 days
x men - 32 days
Then
How many men should be subtracted?
There are 20 to complete in 24 days.
15 are needed to complete in 32 days.
20 - 15 = 5
5 men should be subtracted.
