3 years ago

Which expression is equal to 5x(m-n) 1. (m-5)x(n-5) 2. 5m-5n 3. m-5n

Mathematics

2 answers:

vitfil [10]3 years ago

5 0

#2. 5m-5n would be the equal expression

Flauer [41]3 years ago

4 0

5m-5n
Multiply each term in the parentheses by 5

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Find the product -12 • (-2) A. 10 B. 24 C. -24 D. -14

svetoff [14.1K]

12 x 2 = 24

When you multiply two negative numbers, the answer will be a positive
When you multiply one negative and one positive, the answer will be negative.

Using that rule:

(-12)(-2) = 24

24 is your answer

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6 0

3 years ago

A random sample of the amounts for 22 purchases was taken. The mean was $42.97, the standard deviation was $22.82, and the m

Illusion [34]

Answer: a) 84 and b ) 2084

Step-by-step explanation:

Given : Sample standard deviation : s= $22.82

(Population standard deviation is unknown ) , so we use t-test.

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Formula to find the sample size :

$n=(\dfrac{t^*\cdot s}{E})^2$

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$n=(9.128)^2=83.320384\approx84$

i.e. Required sample size : n= 84

b) E = 1

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$n=(45.64)^2=2083.0096\approx2084$

i.e. Required sample size : n= 2084

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3 years ago

Write y= x^2 - 4x + 6 in vertex form . NEED ASAP!! please !!

worty [1.4K]

First, complete the square.
y = (x^2 - 4x + 4) + 2
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There you go. Have a nice day! :)

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4 years ago

Make q subject of the formula 2(q+p) = 1+5q

m_a_m_a [10]

Answer:

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then make q the subject of the formal

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3 years ago

Read 2 more answers