MATHEMATICS MIDDLE SCHOOL

The mean of four numbers is 21. The range is 15. The greatest number 29.The two middle numbers differ by 3

Answers

Answer 1
Answer:

Answer: 5

Step-by-step explanation:
Answer 2
Answer: The answer to this question is the number 5

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Janice is trying to earn $30 to buy a necklace. She has saved $5.25. She earns $2.25 per hour weeding her grandmother's garden and she earns $5.50 per hour selling seashells at the flea market. Will Janice have enough to buy the necklace if she works in the garden for 2 hours and at the flea market for 4 hours? Use the inequality 2.25y + 5.50z + 5.25 ≥ 30.

Answers

yes she would have 31.75 I think

Answer:

The answer would be: B. or Yes, because the total will be $31.75

How do you know?:

Because my heart said so. And i did the math.  

What is 21/45 simplified?

Answers

21÷3=7
45÷3=15
this means that 21/45 simplified is 7/15

How do you solve 60x4 - tens x4

Answers

Well what u do is that u do 60 x 4 which is 240 and now just do 240 x 10 which is going to be 2400.
Hope this helps

Need help answering this 11⁄14 – 4⁄7=
( IN FRACTION FORM)

Answers

Hi,

Alrighty...

Step One: Common Denominator
11/14 - 11/7

To do this, multiply the second fraction by 2-

11/7 * 2/2 = 22/14

So now you have the problem: 11/14 - 22/14

11-22 = -11
(And the denominators stay the same)

So your answer is -11/14.

Makes sense?

X(x+2)-2(x+2)=3(x+2)

Answers

Answer:

5 or -2

Step-by-step explanation:

simplify this to make it easier.

x^(2) +2x-2x-4=3x+6\n

then combine like terms

x^(2) -4=3x+6

now move everything over to the right

x^(2) -3x-10=0

then if you factor it, you get

(x-5)(x+2)

x can equal 5 or -2

What do i do if i have a problem like this x exponent 5 = 1024 and (-1/7) exponent -x = -1/343

Answers

x^5 = 1024 = 4^5
Therefore, x = 4.

Given, (-1/7)^-x = -1/343
(1/7)^-x = 1/343
(1/7)^-x = (1/7)^3
-x = 3
x = -3
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