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
Aleks04 [339]
3 years ago
13

The ratio of the number of A's in the class to B's in the class was 2:5. How many people got A's if there were 40 people who got

B's?
Mathematics
2 answers:
Umnica [9.8K]3 years ago
7 0

Answer:

16 students got an A

Step-by-step explanation:

Set up an equation to compare the ratio to the scores:

\frac{2}{5} = \frac{x}{40}

Cross multiply:

80 = 5x

Divide each side by 5:

x = 16

Now, check if \frac{16}{40} = \frac{2}{5}

16/8 = 2

40/8 = 5

The ratios are the same! Therefore, 16 students got an A!

Hope this helps! Feel free to contact me if you have any questions :)

oksano4ka [1.4K]3 years ago
3 0

Total- no- of- students = 56\\A -students = Total- no- of- students - B-students\\A - students = 56 - 40\\A students = 16Answer:

A Students = 16 students

Step-by-step explanation:

A :B\\2 :5\\ No- of -A -students =?\\No- of -B -students = 40\\2+5 =7\\\frac{5}{7} *x = 40\\\frac{5x}{7} =40\\Cross - multiply\\280 = 5x\\Divide-both-sides-of-the-equation -by 5\\\\\frac{280}{5}  =   \frac{5x}{5} \\x = 56

You might be interested in
In circle pp, ad¯¯¯¯¯ad¯ is a diameter and bc¯¯¯¯¯bc¯ is perpendicular to ad¯¯¯¯¯ad¯ at ee. if pd=7pd=7 and ae=4ae=4, find cece.
kvv77 [185]
See the attached figure.

<span>ad is a diameter of the circle with center p
</span>
∵ pd = radius = 7 ⇒⇒⇒ ∴ ad = 2 * radius  = 2 * 7 = 14
∵ ae = 4 ⇒⇒⇒ ∴ ed = ad - ae = 14 - 4 = 10
∵ ad is a diameter
Δ acd is a triangle drawn in a half circle
∴ Δ acd is a right triangle at c
∵ bc ⊥ ad at point e
By applying euclid's theorem inside Δ acd
∴ ce² = ae * ed
∴ ce² = 4 * 10 = 40
∴ ce = √40 = 2√10 ≈ 6.325


3 0
3 years ago
Solve each system by graphing.
ycow [4]

Answer:

(2,-1)

Step-by-step explanation:

Solved using math.

3 0
2 years ago
Read 2 more answers
Which of the following statements are true of solving equations?
katrin2010 [14]

we will check each options

option-A:

For solving any equations , we always isolate variables on anyone side

For exp: x+7=1

so, this is TRUE

option-B:

For solving system of equations

For exp:

x-y=1

x+y=3

If we use addition , we could easily solve for x and y

so, this is TRUE

option-C:

We always solve problems using conventional method

we do not guess

so, this is  FALSE

option-D:

We often reverse order of operation

For exp:

(x-2)^2-3=0

so, this is TRUE

option-E:

For linear equations , we always get one solution , infinite solutions or no solutions

so, this is FALSE

5 0
3 years ago
Read 2 more answers
Plz help ill give 17 points thx
Blizzard [7]

Answer:

1:6 = 7:42

Step-by-step explanation:

6 0
2 years ago
Need help understanding and answering this please and thank you.
Goshia [24]

It's important to know that rigid transformations don't change the size or shape, this means the corresponding angles between the image and preimage are congruent. Due to the reflection transformation, angle C corresponds to angle Z.

<h2>Therefore, the answer is angle Z.</h2>
5 0
1 year ago
Other questions:
  • if the cost of 4 shirts 4 pants 2cap is 560 dollars in a shop and the cost of 9shirts 9 paints and 6 caps is 1290 dollars then f
    7·1 answer
  • 73 cubed root lies between which two integers
    9·2 answers
  • Anyone good in geometry? need help.Extra points​
    13·1 answer
  • Factor the expression. x²- 121
    6·2 answers
  • Melissa made a school banner that is 3 yards long in a 11 over 12 yards wide what is the area of the banner
    6·2 answers
  • 10
    14·1 answer
  • Find the value of x. Round your answer to the nearest tenth.
    14·1 answer
  • Rosalyn is planning to sell her apartment complex. Ten years ago, she bought the eight-room complex for $420,000.
    11·2 answers
  • Is what's below a complete sentence or a fragment?<br> Iris West is very happy today.
    7·2 answers
  • The Roxbury CC Tigers basketball team scored 12 points in the first 6 minutes of a game. If they continue at the same pace, how
    13·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!