1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
LenKa [72]
3 years ago
6

Evaluate 15% of 80% of 90

Mathematics
1 answer:
Marizza181 [45]3 years ago
8 0
First you find 80% of 90. Set up the proportion:
80 X
—— = —-
100 90
I’m simplifying the 80/100 so it’ll be easier to solve:
4 X
— = —-
5 90
Then cross multiply:
4(90) = 5x
360 = 5x
x = 72

So 80% of 90 is 72. (Or you could have multiplied 90 by 0.8 as a shortcut). Now you find 15% of 72. You can either multiply 72 by 0.15 or set up the proportion like this:
15 X
—— = —-
100 72
Cross multiply and solve. You should get 10.8
You might be interested in
The price for a TV was decreased by 20% and then by 10%. By what percent was the new price lower than the original?
Finger [1]
Let's say the tv was 100$ . Reduced by 20% means the tv is now 100 - 20 = 80% of the original price.

0.8(100) = 80$
Reduced again; by 10% means that it is now 100-10 = 90% of the 80$
0.9(80) = 72$

sale price ÷ original price

72$ / 100$ = 0.72 which is 72% of the original price. Which is a mark down of:
100 - 72 = 28%

The new price is 28% lower than the original price.

7 0
3 years ago
I need help with Evaluating a linear expression: Integer multiplication with addition or subtraction. Its hard
Andrei [34K]

Answer:

can you put a link up?

Step-by-step explanation:

3 0
3 years ago
Can someone help me? Thanks!
scZoUnD [109]
3 to the -3 power.. ...
7 0
3 years ago
Read 2 more answers
Five friends divide three bags of apples equally between them write the division represented in this situation as a fraction
ratelena [41]
We are given the statement stating five friends dividing three bags of apples equally. IN this case, since 3 is not divisible by 5, then the answer is a fraction. The numerator is the number of bags of apples and the denominator is the number of friends. The answer is 3/5
6 0
3 years ago
Find all the values of k so that the given points are 29 square units apart. (-5, 5) and (k,0).
Varvara68 [4.7K]
Distance formula between 2 points (x1,y1) and (x2,y2)

D=\sqrt{(x1-x2)^{2}+(y1-y2)^{2}}

D=29 and one point is (-5,5) and the other is (k,0)
sub

29=\sqrt{(-5-k)^{2}+(5-0)^{2}}
29=\sqrt{(-5-k)^{2}+(5)^{2}}
square both sides
841=(-5-k)^{2}+(5)^{2}
841=(-5-k)^{2}+25
minus 25 both sides
816=(-5-k)^{2}
square root both sides don't forget positive and negative roots
+/-4√51=-5-k
add 5 to both sides
5+/-4√51=-k
times -1 both sides
-5+/-4√51=k




the possible values for k are
k=-5+4√51 or k=-5-4√51

7 0
3 years ago
Other questions:
  • The sum of the two digits of a number is 16. The number formed by reversing the digits is 18 more than the original number. Dete
    9·1 answer
  • Find the volume of a rectangular prism with the following dimensions:
    10·1 answer
  • 4. The Eisenhower Tunnel in Colorado was completed in 1973 and is the
    10·1 answer
  • Solve for x in the equation x squared plus 4X minus 4 equals 8​
    13·1 answer
  • PLEASE ANSWER!!! A theater group made appearances in two cities. The hotel charge before tax in the second city was $1000 lower
    12·1 answer
  • 3 + 2x + 7 = −3x − 9 solve and show the work
    5·1 answer
  • Circle Q has a circumference of approximately 50 centimeters.What is the approximate length of the diameter, d? Use 3.14 for . R
    7·1 answer
  • Examine the following steps. Which do you think you might use to prove the identity Tangent (x) = StartFraction tangent (x) + ta
    12·2 answers
  • Jamal's Lawn Service often fertilizes lawn in the spring. Jamal charges $3.50 per square yard. How much will Jamal charge to fer
    8·2 answers
  • A<br> ОЈ<br> 6(3+2d) = 54<br> I need that answer
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!