Choose the answer.1. What is the perimeter of this shape?

Answers

Answer 1

Answer: add up all of the outside sides. 2 + 5 + 2.5 + 2 + 7 + 2 + 2.5 + 5 the correct answer is D) 28.

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{1,2,3,...,75,76,78} how many numbers in the set above have 2 as a factor but not have 10 as a factorA) 32
B) 35
C)39
D)40

Answers

Answer:

A) 32

Step-by-step explanation:

From 1 to 10 we have 4 numbers which are {2,4,6,8}

From 10 to 20 we have 4 numbers which are {12,14,16,18}

From 70 to 78 we have 4 numbers which are {72,747,6,78}

conclusion: we 4×8 number = 32

Three consecutive multiples of 5 have a sum of 75. What is the least number?

Answers

If we let x equal the first number, then the next number has to be x + 5 (since they are multiples of 5) and the next would be x + 10. Now we just add them and set them equal to 75...

x + x+5 + x+10 = 75

Combine like terms

3x + 15 = 75

subtract 15 from each side

3x = 60

divide each side by 3

x = 20

So the least number is 20

*Now let's check to make sure we are right...
20 + 25 + 30 = 75
75 = 75 True... It checks!

Maxine spent 15 hours doing her homework last week. This week she spent 18 hours doing homework. She says that she spent 120% more time doing homework this week. Is she correct? Show your work to justify your decision

Answers

The best way to solve this problem is to use the 'rule of three":

If 15% correspond to 100%

then 18% correspond to X%

We notice that both lines are in the following proportion:

(15) / (100%) = (18) / (X%)======> X%= (18 x 100%) / 15= 6/5 = 1.2 =120%

Answer:

Maxine is incorrect.

Step-by-step explanation:

18 - 15 = 3 3/15 = 0.2 0.2(100) = 20.

20% is the percent of increase. 120% would be the total of both combined. Since we are only looking for how much more, it would be 20%.

Complete the equation for the linear function whose graph contains the points (9, 7) and (4, –8).

Answers

Answer:

$\boxed{\boxed{y-7=3(x-9)}}$

Step-by-step explanation:

The given points are $(9, 7),(4, -8)$

We can get the line equation passing through these points by applying point slope formula.

The slope of the line joining these two points would be,

$=(y_2-y_1)/(x_2-x_1)$

$=(-8-7)/(4-9)$

$=(-15)/(-5)$

$=3$

The general point slope form of straight line is,

$y-y_1=m(x-x_1)$

Putting the slope as 3 and the point as (9, 7),

$y-7=3(x-9)$

y-7=3(x-9) or it could be y=3x-20

70.5 - 6.81 =
63.69
63.71
64.69
77.31

Answers

Answer:

63.69

Step-by-step explanation:

A political research assistant randomly selects 100 voters to predict the outcome of the upcoming Presidential election. He determines from the data that 53 participants will be voting for the incumbent President. 28 voters will be voting for a relatively unknown candidate, and 19 voters are undecided. Why are the results likely to be erroneous?A) The results are too varied among the 100 voters.
B) The sample size should not include undecided voters.
C) The sample size is probably more biased because it is so small.
D) The population of all voters is huge when compared to the sample size.

Answers

the answer is d the sample size should be in proportion to the total population. Millions of people vote in the presidential elections. Sampling 100 people can't give a reliable vote

Answer:

Step-by-step explanation:

It is D because i had this question earlier and i had got it wrong so just trying to help others in need of the answer

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