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
Ksivusya [100]
3 years ago
12

The ratio of girls to boys in the grade is 7 to 8. If there are 140 girls, how many boys are there

Mathematics
2 answers:
Kipish [7]3 years ago
4 0

there are 160 boys in the grade

Schach [20]3 years ago
3 0
There are 160 boys.

Set up a proportion:

the ratio of girls to boys is 7/8, we don’t know how many boys there are but we know that there are 140 girls.


7/8 = 140/x

Make sure that girls and girls are across from each other in the proportion. 7 should be across from 140. 8 is across from x. X represents how many boys there are.

Solve for X (the amount of boys) and you get 160 boys.

And you can always check your answer by plugging it back into the problem.
You might be interested in
Drag each situation to show whether it can be modeled using a linear or an exponential function. If the situation cannot be mode
Goshia [24]

Answer:

bihdbhdvn sfv jdn vhusrvnfg k,b snjbstdnj fcmranfbtgb,fy hje5rtgbv mdrhgsdmrmgbhedslrk cj5rtkolg segpo esjxmh9iorexdsvjbyhklycf,x n

Step-by-step explanation:

5 0
2 years ago
What is the credit-to-debit ratio on the handy hardware credit card?
olga nikolaevna [1]

The debt-to-credit ratio of a credit account is the ratio of the balance to the credit limit:

... balance/credit limit = 245.78/3500 = 0.07022... ≈ 7.02%

The appropriate choice is ...

... A.) 7.02%

7 0
3 years ago
K-12.7=3.24<br> Solve for k<br> K=
DedPeter [7]

Answer:

k = 15.94

Step-by-step explanation:

3 0
3 years ago
A manufacturer produces bearings, but because of variability in the production process, not all of the bearings have the same di
Lena [83]

Answer:

Proportion of all bearings falls in the acceptable range = 0.9973 or 99.73% .

Step-by-step explanation:

We are given that the diameters have a normal distribution with a mean of 1.3 centimeters (cm) and a standard deviation of 0.01 cm i.e.;

Mean, \mu = 1.3 cm            and           Standard deviation, \sigma = 0.01 cm

Also, since distribution is normal;

                 Z = \frac{X -\mu}{\sigma} ~ N(0,1)

Let X = range of diameters

So, P(1.27 < X < 1.33) = P(X < 1.33) - P(X <=1.27)

  P(X < 1.33) = P( \frac{X -\mu}{\sigma} < \frac{1.33 -1.3}{0.01} ) = P(Z < 3) = 0.99865

  P(X <= 1.27) = P( \frac{X -\mu}{\sigma} < \frac{1.27 -1.3}{0.01} ) = P(Z < -3) = 1 - P(Z < 3) = 1 - 0.99865

                                                                                            = 0.00135

 P(1.27 < X < 1.33) = 0.99865 - 0.00135 = 0.9973 .

Therefore, proportion of all bearings that falls in this acceptable range is 99.73% .

7 0
3 years ago
Which expression is the same as 8x (4 x 2)? ​
ANTONII [103]

Answer:

64x

Step-by-step explanation:

because 4 * 2 is in parenthesis, that means you multiply 8x by them.

8x (4*2)

8x (8)

64x

5 0
2 years ago
Other questions:
  • What is the surface area of the triangular prism?<br> A135<br> B150<br> C120<br> D115
    8·1 answer
  • Anyone know the answer?
    9·1 answer
  • What are the solutions to the equation 0=x^2+5x-6?
    8·1 answer
  • Solve.<br><br>      z-5<br> ________= -1<br>       7<br><br> z=_____
    11·2 answers
  • How do I go about solving this?
    9·1 answer
  • PLZ HALP!!! STUDY ISLAND BE MEAN
    15·1 answer
  • Help me with this answer please
    6·2 answers
  • What is the general rule of the following geometric sequence<br><br>-4; -1; -1/4​
    9·1 answer
  • What is the equation of this line?
    14·1 answer
  • It costs $3.00 to rent a boat on the lake for hour. Select ALL the statements that correctly match this ratio.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!