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
topjm [15]
2 years ago
6

A recipe calls for 3 cups of flour to make 2 batches of dinner rolls. One batch makes 15 rolls. Laura is making dinner for 12 pe

ople and only needs one roll per person.
What proportion will help Laura find how much flour is needed to make 12 dinner rolls?
A. 3/30 = x/12
B. 3/2 = x/12
C. 3/15 = x/12
D. 12/15 = x/3
Mathematics
2 answers:
sveticcg [70]2 years ago
6 0
A. 3/30=x/12
Or B 3/2 = x/12
Maru [420]2 years ago
4 0

Answer:

A

Step-by-step explanation:

3 cups of flour produces 2 batches of dinner rolls. So, if one batch makes 15 rolls, then 2 batches makes 30 rolls. Therefore, 3 cups of flour produces 30 rolls.

Laura wants to find how much flour she needs to make 12 rolls.

Here's the setup:

Let x be the number of cups of flour needed. Then,

(3 cups of flour)/(30 rolls)=(x cups of flour)/(12 rolls)

This is the set up for all equations involving ratios. The units should be consistent. Notice how I have flour/rolls=flour/rolls.

It is not necessary to solve the equation, but you should to make sure your answer makes sense. By cross-multiplying, we get x=(3*12)/30 or 1.2 cups.

This solution makes sense. Because 3 cups of flour produces 30 rolls, one cup produces 10 rolls. We need slightly more than 1 cup to get 12 rolls.

You might be interested in
If y is equal to 10 and x is equal to 100 what will be their sum​
Naya [18.7K]

Answer:

110

Step-by-step explanation:

Well, it could be

y+x

10+100

= 110

3 0
2 years ago
Show that 2 - sqrt(2) is irrational
babunello [35]

Answer:

This proof can be done by contradiction.

Let us assume that 2 - √2 is rational number.

So, by the definition of rational number, we can write it as

2 -\sqrt{2} = \dfrac{a}{b}

where a & b are any integer.

⇒ \sqrt{2} = 2 - \dfrac{a}{b}

Since, a and b are integers 2 - \dfrac{a}{b} is also rational.

and therefore √2 is rational number.

This contradicts the fact that √2 is irrational number.

Hence our assumption that 2 - √2 is rational number is false.

Therefore, 2 - √2 is irrational number.

3 0
3 years ago
For f(x)=2x+1 and g(x)=x^2-7, find (f+g)(x) A. 2x^2-15 B.X^2+2x-6 C.2x^3-6 D.x^2+2x+8
Advocard [28]

Answer:

C

Step-by-step explanation:

(f + g)(x) = f(x) + g(x) , thus

f(x) + g(x)

= 2x + 1 + x² - 7 ← collect like terms

= x² + 2x - 6 → C

5 0
3 years ago
Direction: the indicated operation reduce the answer to lowest terms whenever possible.
andrew11 [14]

Answer:

here you go:

Step-by-step explanation:

1:4/3

2:1.549

3:18.5

4:3/2

5:157/65

6:2.067

7:1/4

8:17/15

9;3/2

10;1/2

7 0
2 years ago
Read 2 more answers
|x|-5 what does the vertical bar means?​
Masja [62]

Answer:

it means absolute valuen so anything inside becomes a positve.

Step-by-step explanation:

6 0
3 years ago
Other questions:
  • Explain how to subtract 247 from 538
    13·2 answers
  • Three times the 1st number plus the 2nd number plus twice the 3rd is 5. If three times the 2nd number is subtracted from the sum
    12·2 answers
  • What substitution should be used to rewrite 4x^4-21x^2+20=0 as a quadratic equation ​
    8·1 answer
  • Simplify. <br><br> (-4)2 · 2 + 3 - 5 · 3
    7·1 answer
  • Find these absolute values 8
    10·1 answer
  • 1/2x- 37 =- 84<br> Solve please
    13·2 answers
  • Find the volume of this composite figure and explain how you got your answer
    11·1 answer
  • The average of 2 numbers is 1/2. if one of the numbers is 11/17 then the other number is ___
    14·1 answer
  • 18 x 5 Use mental math to solve. Find as many strategies as you can to solve. Record and describe each strategy.
    10·1 answer
  • Scores on a certain intelligence test for children between ages 13 and 15 years are approximately normally distributed with μ=10
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!