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
Mnenie [13.5K]
1 year ago
12

If a = 12 and 120% of a is equal to 80\% of bthen what is a + b ?

Mathematics
1 answer:
Novosadov [1.4K]1 year ago
4 0

Answer:

The answer is 30

Step-by-step explanation:

First you have to find 120% of a (12).

\frac{12}{1}  \times  \frac{120}{100}  = 14.4

Therefore; 14.4 is 80% of b, and we are trying to find 100% of b

14.4 = 80\% \\ x = 100\%

we do not know what is 100% therefore we call it *x*. In order to find this unknown value *x* we cross multiply.

14.4 \times 100\% = 80\% \times x

This is the same as saying;

14.4  \times 1 = x \times  \frac{4}{5}

100% percent would be 1 because it is the whole number we are trying to find. The 80% would be 4/5. To get 4/5 you can simply break down 80/100 ( this is 80% as a fraction).

so the new equation is: 14.4= 4/5x

We divide both sides by 4/5. Then we will get x tobe equal to 18. Therefore b is 18. We were asked to find (a + b) so.<em> </em><em>1</em><em>8</em><em>+</em><em>1</em><em>2</em><em> </em><em>=</em><em> </em><em>30</em>

You might be interested in
Evaluate the expression.
AVprozaik [17]

Answer:

add my sc = bmic ava, no spaces

or add my discord = XoXo_ava

Step-by-step explanation:

Also have a great day and remember youre worth, dont let no boy/girl tear u down. leave them h*es aside and focus on yo self!!!

4 0
2 years ago
PLEASE HELP
Rashid [163]

See the image below, hope it helps!

7 0
2 years ago
Read 2 more answers
15=-6 you solve the left side, 7+6 which is 15
Nimfa-mama [501]

Answer:

15=13

Step-by-step explanation:

15=-6 you solve the left side, 7+6 which is 15?

15=-6 =

7+6 = 13

15=13

i'm not sure...

7 0
2 years ago
Read 2 more answers
What is the inverse of the function f(x) = 2x - 10?
ollegr [7]

Answer:

h(x) = x/2 + 5

Step-by-step explanation:

f(x) = 2x - 10

Step 1. Replace f(x) with y.

y = 2x - 10

Step 2. Switch variables x and y.

x = 2y - 10

Step 3. Solve for y.

2y - 10 = x

2y = x + 10

y = x/2 + 5

Step 4. Replace y with h(x)

h(x) = x/2 + 5

4 0
2 years ago
Read 2 more answers
Write the number 23.785 in expanded form and in word form
Anastasy [175]

Answer:

20+3+0.7+0.08+0.005

Step-by-step explanation:

can you follow me

5 0
3 years ago
Other questions:
  • Help me please, thank you!!!!!
    11·1 answer
  • Which is greater 10 yards or 360 inches?
    15·1 answer
  • Two friends, Khalid and Sue, have a combined height of 126 inches. The difference between Khalid’s height and Sue’s height is 6
    15·1 answer
  • Please help I will mark you brainlist if correct
    6·2 answers
  • One quadratic function has the formula h(x) = -x 2 + 4x - 2. Another quadratic function, g(x), has the graph shown below
    14·2 answers
  • Question 1 (1 point)
    15·1 answer
  • Stefan sells Jin a bicycle for $163 and a helmet for $17. The total cost for Jin is 150% of what Stefan spent originally to buy
    14·2 answers
  • Quadrilateral GHIJ is similar to quadrilateral KLMN. Find the measure of
    6·1 answer
  • 44 less than 7 times the measure of an angle is equal to 22 more than 4 times the measure of the angle
    11·1 answer
  • A line passes through the point (8,-4) and the y. intercept is -16.​
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!