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
kari74 [83]
3 years ago
15

I have 4 times the homework than my brother. I have 9 more sheets than him. How many sheets of homework do we have altogether?

Mathematics
1 answer:
dem82 [27]3 years ago
7 0

Answer:

15 sheets of homework

Step-by-step explanation:

That is because you have 12 sheets of homework and your brother has 3 sheets of homework. 3*4=12 and 3+9=12

So 12 + 3 =15

You might be interested in
How many kilograms of a 5% salt solution and how many kilograms of a 15% salt solution must be mixed together to make 45kg of an
JulsSmile [24]

Answer:

31.5 kilograms of a 5% salt solution and 13.5 kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution .

Step-by-step explanation:

Let us assume that the number of kilograms of a 5% salt solution used be x .

Let us assume that the number of kilograms of a 15% salt solution used be y .

As given

A 5% salt solution and 15% salt solution must be mixed together to make 45kg of an 8% salt solution .

Equation becomes

x + y = 45

5% is written in the decimal form .

= \frac{5}{100}

= 0.05

15% is written in the decimal form .

= \frac{15}{100}

= 0.15

8% is written in the decimal form .

= \frac{8}{100}

= 0.08

Thus

Concentration of 5% salt solution × Number of kilograms of 5% salt solution used + Concentration of 15% salt solution × Number of kilograms of  15% solution used = Concentration of 8% salt solution × Number of kilograms of 8% salt solution

Thus

0.05x + 0.15y = 0.08 × 45

Simplify the above

\frac{5x}{100} + \frac{15y}{100} = \frac{8\times 45}{100}

5x + 15y = 360

Thus two equations becomes

x + y = 45

5x + 15y = 360

Multiply x + y = 45 by 5 and subtracted from 5x + 15y = 360 .

5x - 5x + 15y - 5y = 360 - 225

10y = 135

y = \frac{135}{10}

y = 13.5 kilograms

Put value of y in the equation

x + 13.5 = 45

x = 45 - 13.5

x = 31.5 kilograms

Therefore the 31.5 kilograms of a 5% salt solution and 13.5 kilograms of a 15% salt solution must be mixed together to make 45kg of an 8% salt solution .

5 0
3 years ago
PLEASE HELP ME!!!!! GIVING (17 POINTS)
bija089 [108]

Answer:

61.)   A, B, A

62.) 120 minutes

Step-by-step explanation:

61.) 48 is a multiple of 6. A multiple is a number which can be fully divided into another number (divded without remainder). Therefore, 48 is a multiple of 6 because 6 * 8 = 48 meaning that 48/6 would equal 8. Because there is no remainder, Carly can put the beads into 6 equal groups.

62.) This is a simple conversion problem. Since they are asking the amount of minutes, you need to convert 2 hours to minutes. You do not need to calculate it or set up a formula because there are 60 minutes in one hour, therore, in 2 hours there are 120 minutes (60 minutes + 60 minutes).

4 0
2 years ago
Can someone step by step explain the answer please
Vinvika [58]

Answer: z = \sqrt{10}

Step-by-step explanation:

To find <em>z</em>, you must set up a proportion to solve.

To find the altitude of a special right triangle, the formula is:

\frac{a}{x} =\frac{x}{b}

You can use <em>5</em> as <em>a</em> and <em>2</em> as <em>b</em> to complete the proportion:

\frac{5}{z} =\frac{z}{2}

Next, to solve:

<u>Step 1</u>: Cross-multiply.

\frac{5}{z} =\frac{z}{2}

(5)*(2) = z*z

10 = z²

<u>Step 2</u>: Take square root.

10 = z²

√10 = z

I hope this helps!

8 0
2 years ago
Rahul have 55 chocolate he gave 4/5 chocolate to his friend how much chocolate are left with him​
garri49 [273]

Answer:

<h2><u><em>11</em></u></h2>

Step-by-step explanation:

Rahul have 55 chocolate he gave 4/5 chocolate to his friend how much chocolate are left with him​

55 = 5/5

5/5 - 4/5 = 1/5

55 : 5 = <u><em>11</em></u>

5 0
1 year ago
Which of the following lists the order of operations in the correct order?
love history [14]

Answer:

whats the list

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Other questions:
  • Jan mixed 2 pints of blue paint with 5 pints of red paint to make purple paint. He wrote the equation b= ( )r to represent the p
    5·1 answer
  • Equation of the blue graph? Thank you!
    15·2 answers
  • Write the slope intercept form of the equation of the line through (-4,5) and a slope of -2
    14·1 answer
  • A cookie factory uses 5/8 of a bag of chocolate chips in each batch of cookies. The factory used 8 1/8 bags of chocolate chips y
    14·1 answer
  • Use a property to write an equivalent expression for the expression below . Tell which property you used 7 (3x +8).
    14·1 answer
  • X=1.5 and y = 3 the sum of x and y is ?
    9·2 answers
  • A robot can complete 5 tasks in 2/3 hour. Each task takes the same amount of time.
    14·1 answer
  • 1. There are 16 boys and 18 girls in a Grade 6 math class. Write the ratio of girls to boys in words as simply as possible.
    7·1 answer
  • BRAINLIEST IF CORRECT i really need help to keep my grade up
    5·1 answer
  • 13<br> y у<br> 3<br> Х<br> 4<br> What is y?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!