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
marta [7]
2 years ago
14

David had 80 dollars from washing cars

Mathematics
1 answer:
Tomtit [17]2 years ago
8 0

Answer:

It cost 30$

Step-by-step explanation:

Since 50% is 1/2 we put 80/2

so we have 40

25% is 1/4 we put 40/4=10 40-10=30

so the answer is 30

You might be interested in
Quadratic equations w complex roots <br> x2 - 6x + 12 = 0
Dmitriy789 [7]

Answer:

x = 3 ± i \sqrt{3}

Step-by-step explanation:

Given

x² - 6x + 12 = 0 ( subtract 12 from both sides )

x² - 6x = - 12

Using the method of completing the square

add ( half the coefficient of the x- term )² to both sides

x² + 2(- 3)x + 9 = - 12 + 9

(x - 3)² = - 3 ( take the square root of both sides )

x - 3 = ± \sqrt{-3} = ± i \sqrt{3} ( add 3 to both sides )

x = 3 ± i \sqrt{3}

7 0
2 years ago
How do you write 9.964 as a percentage
BARSIC [14]

Answer:

If theres a whole number, it’s the whole number but make it into the hundreds.
its 9.964.
We already know its 900% and up.
.964 is 964/1000
So .964
996.4%
If you want a easier way, you can always mov the decimal place 2 times to the right.

8 0
2 years ago
Which best explains why 5 x 4 is greater than 5 x 1/4 ?
zmey [24]
Because one is put into fraction form. Therefore the one in fraction form is going to be smaller. 5*4=20 and 5*1/4=1.25. I hope my answer helped you.
3 0
3 years ago
Are these factors equivalent or nonequivalent?
dusya [7]
I'm pretty sure the above fractions are equivalent because if you reduce 5s/15t then it equals s/3t.
6 0
3 years ago
Not sure how to make an equation for this problem. The equation I put was 86 - 8 = b x 2 = 156. But, it is starting that is inco
Elden [556K]

Answer:

b/2 + 8 = 86

b = 156

Step-by-step explanation:

Half the comics is b/2

b/2 + 8 = 86

Subtract 8 from both sides

b/2 = 78

multiply both sides by 2

b = 156

7 0
3 years ago
Other questions:
  • How many times greater is one hour than one minute
    9·2 answers
  • Philip Morris wishes to determine if there is a difference between the proportion of women and proportion of men who smoke cigar
    7·1 answer
  • in 2005-2006 the average attendance at a premiership football match was 34000 to the nearest 1000 what was the smallest possible
    6·1 answer
  • What is the simplified form of the following expression
    12·1 answer
  • What is 36t squared plus 4s squared
    5·1 answer
  • Twice the difference of a number and 3 is 5.​
    8·1 answer
  • Beth is putting liquid fertilizer on the plants in three flower pots her measuring Spoon holds 1/8 teaspoon the directions say t
    6·1 answer
  • Plz help me plz!!!!!!​
    14·1 answer
  • How does Bolsa describe Billy Joe? smart funny crazy
    5·1 answer
  • For the following distribution: x p(x) 0 01.30 1 0.346 2 0.346 3 0.154 4 0.026 what is the mean of the distribution?
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!