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4 years ago

1. Simplify the expression. -(3)4 O A 1 81 B1 C 81 D 12

Mathematics

1 answer:

notsponge [240]4 years ago

7 0

Answer:

Step-by-step explanation:

you will multiply the 3 and 4 because the 3 is is (). Because it is a negative the answer will carry the negative symbol. -1× is not an answer, but 12 is. D is the answer

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Which expression can be used to determine 50% of 42? 42 minus 2 42 divided by 2 42 divided by 10 42 minus 10

Mrrafil [7]

Answer:

We know that 50% of 42 will be = 21

i.e. 50% of 42 = 50/100 = 21

The correct answer should be: 42 divided by 2

Step-by-step explanation:

We know that 50% of 42 will be = 21

i.e. 50% of 42 = 50/100 = 21

Also, when we divide 42 by 2, we get the answer 21.

i.e. 42/2 = 21

Therefore, the correct answer should be: 42 divided by 2

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3 years ago

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The chess club is selling drinks during the tract and field event.The club purchases water,juice boxes,and pouches of lemonade f

Akimi4 [234]

Answer: 233.92

Step-by-step explanation:

6.80 times 3 = 20.4

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3 years ago

Arrange these functions from the greatest to the least value based on the average rate of change in the specified interval.

Romashka [77]

By definition, the average change of rate is given by:
$AVR = \frac{f(x2)-f(x1)}{x2-x1}$
We will calculate AVR for each of the functions.
We have then:

f(x) = x^2 + 3x interval: [-2, 3]:
$f(-2) = x^2 + 3x = (-2)^2 + 3(-2) = 4 - 6 = -2

f(3) = x^2 + 3x = (3)^2 + 3(3) = 9 + 9 = 18$
$AVR = \frac{-2-18}{-2-3}$
$AVR = \frac{-20}{-5}$
$AVR = 4$

f(x) = 3x - 8 interval: [4, 5]:
$f(4) = 3(4) - 8 = 12 - 8 = 4 f(5) = 3(5) - 8 = 15 - 8 = 7$
$AVR = \frac{7-4}{5-4}$
$AVR = \frac{3}{1}$
$AVR = 3$

f(x) = x^2 - 2x interval: [-3, 4]
$f(-3) = (-3)^2 - 2(-3) = 9 + 6 = 15

f(4) = (4)^2 - 2(4) = 16 - 8 = 8$
$AVR = \frac{8-15}{4+3}$
$AVR = \frac{-7}{7}$
$AVR = -1$

f(x) = x^2 - 5 interval: [-1, 1]
$f(-1) = (-1)^2 - 5 = 1 - 5 = -4

f(1) = (1)^2 - 5 = 1 - 5 = -4$
$AVR = \frac{-4+4}{1+1}$
$AVR = \frac{0}{2}$
$AVR = 0$

Answer:
these functions from the greatest to the least value based on the average rate of change are:
f(x) = x^2 + 3x
f(x) = 3x - 8
f(x) = x^2 - 5
f(x) = x^2 - 2x

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4 years ago

I will mark you brainlist!

stepan [7]

Answer:

15 times

Step-by-step explanation:

6 green erasers / 20 total erasers =0.3

0.3(50) = 15

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3 years ago

What is the value of n?<br> Please explain I'm really lost :(

Tomtit [17]

3n = 24
n = 8

answer
n = 8

7 0

4 years ago

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