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
svetoff [14.1K]
3 years ago
14

Plz help will make brainlyist

Mathematics
1 answer:
siniylev [52]3 years ago
3 0

Answer:

A. 6

B. 143

C. The words "less than", "equal to", and "no more than"

Step-by-step explanation:

For a, we would want to first make an equation to represent the problem. It appears you've already figured that out though, so lets solve it!

Subtract 56 on both sides.

-6m=-36

Now divide -36 by -6 to isolate m.

m=6

It will take her 6 minutes.

For B, we need to make another equation.

2.95b<450-28

First, we can subtract 28 from the total, because she has already spent $28.

Now our equation is 2.95b<422

Lastly, just divide both sides by 2.95 to isolate b.

Our solution is 143. So she can buy 143 batteries.

Lastly, for 13, we can say that the words "less than", "equal to" and "no more than" can indicate an inequality in a real word problem.

Hope this helps!

You might be interested in
I need help plz will give brainliest!!!
Leokris [45]

Answer:

18 red marbles

Step-by-step explanation:

Because the ratio of yellow marbles to red marbles is 1:6 in the population, the expected number of red marbles is 6 times the number of yellow marbles in the representative sample. there should be 18 red marbles.

7 0
3 years ago
Is anybody better at this then I am ?
lbvjy [14]

Answer:

hmmm

Step-by-step explanation:

8 0
3 years ago
The perimeter of a rectangular field is 380 yd. the length is 70 yd longer than the width. find the dimensions.
GaryK [48]
P=2L+2W
380=2*70+2W
380=140+2W
2W=240
W=120

The dimensions are 70 yd and 120 yd

Hope this helps!
3 0
3 years ago
A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a
laila [671]

Complete Question

A survey is planned to estimate the proportion of voters who support a proposed gun control law. The estimate should be within a margin of error of ±5% with 90% confidence, and we do not have any prior knowledge about the proportion who might support the law. How many people need to be included in the sample?

Round your answer up to the nearest integer.

sample size = _____

Answer:

The sample size is n = 271    

Step-by-step explanation:

From the question we are told that  

   The margin of error is  E = 5% = 0.05

Generally given that there was no prior knowledge about the proportion of who might support the law, we will assume the sample proportion to be  

     \^ p =  0.5

From the question we are told the confidence level is  90% , hence the level of significance is    

      \alpha = (100 - 90 ) \%

=>   \alpha = 0.05

Generally from the normal distribution table the critical value  of  \frac{\alpha }{2} is  

   Z_{\frac{\alpha }{2} } =  1.645

Generally the sample size is mathematically represented as  

    n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )

=>   n = [\frac{1.645 }{0.05} ]^2 * 0.5 (1 - 0.5 )

=>   n = 271    

5 0
3 years ago
I NEED HELP ! <br> 2=log(3x+4)
dybincka [34]

2=log(3x+4)


y = loga b    a^y = b

since this is base 10

10^2 =3x+4

100 = 3x+4

subtract 4 from each side

96 =3x

divide by 3

32=x


5 0
3 years ago
Other questions:
  • What is the highest unit price for kazoo
    10·1 answer
  • What is the answer to 5x + 3y =31 and 2x+3y= 25 using elimination method
    5·1 answer
  • 1. The earth makes a full rotation in 24 hours. Jupiter takes approximately 58 days, 15 h, and 30 min to complete a full rotatio
    7·1 answer
  • 14. The prime factorization of a number is
    14·1 answer
  • Lamika buys 12 packs of juice boxes that are on sale
    5·1 answer
  • What is the domain of the graphed function?
    13·1 answer
  • Let m=x²-5. which equation is equivalent to (x²-5)²-3x²+15=-2 in term of m?
    5·1 answer
  • Simplify the expression. 1−(sec2x−tan2x)
    8·1 answer
  • A bag contains 4 red balls and 6 green balls. You plan to select 3 balls at random. Determine the probability of selecting 3 gre
    10·2 answers
  • The side length of a cube is (x^2-1/2).<br> Determine the volume of the cube.
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!