MATHEMATICS MIDDLE SCHOOL

Find the value of the expression below for x=10x² - 2(x + 5)

A. 10
B. 70
C. 85
D. 90

Answers

Answer 1
Answer: Answer is B

Work:
10^2 -2(10+5)
100- 2(15)
100-30
=70

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What is the least number that has 4 odd factors that are all the same
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What ate the coordinates of the fourth point that could be connected with (-8, 0), (1,0), and (1-5)

Answers

Well you can find out by the question it's pretty easy....

you have to find the same x coordinates and then see what the difference is in the y coordinate. For example, (1,0), and (1,-5) the difference is -5. So for (-8,0), and (1,0) your answer would be (8,-5)

PLS HELP AND I DONT HAVE A CALCULATOR WITH ME :(
a=98x21x65

Answers

First, you multiply  98*21 which equals 2058. Then, you multiply 2058 times 65 which equals 133770 and there's your answer.
the answer is
98×21×65=

133770

Why it is not reasonable to say that 4.23 is less than 4.135

Answers


It is not reasonable to say that  4.23  is less than  4.135,
because  4.23  is more than  4.135.
Because if you think without the decimal points then see which one is greater.

hope this helps

Mathew has 2148 poppies he has 200 people how many poppies dose everyone get.

Answers

Here you have to divide the amount of poppies by the people so 2148÷2000=10.74 but you would want to round down to 10 since you cant give a person 10.74 of a flower.

108 identical books have a mass of 30 kg. Find(i) the mass of 150 such books,
(ii) the number of such books that have a mass
of 20 kg.

Answers

Answer:

The mass of 150 books = 41.7kg

The number of books that have mass 20kg = 72 books

Step-by-step explanation:

(I) Number of identical books = 108

Mass of  books = 30 kg

Mass of 150 books = ?

Let the mass of 150 books = x kg

To find the mass of 150 books we will use ratio and proportion:

108 books: 30kg = 150 books: x kg

You can also write it like this because ratio can be written in division:

108/30 = 150/x

By cross multiplication:

108x = 150*30

108 x= 4500

Divide both sides by 108

108 x/108 = 4500/108

x= 41.7

Thus the mass of 150 books = 41.7kg

( ii ) The number of books that have a mass of 20 kg = ?

Let assume that the number of books of mass 20 kg = y books

We will again use ratio and proportion method.

108 books: 30kg = y: 20kg

We can write it as:

108/30 = y/20

By cross multiplication:

108 *20 = 30y

2160= 30y

Divide both the terms by 30

2160/30 = 30y/30

72 = y

Therefore the number of books that have mass 20kg = 72 books ....

How are the areas of two similar figures related

Answers

If two polygons are similar, the ratio of their areas is equal to the square of the ratio of their corresponding sides.
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