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3 years ago

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7. Which pair shows equivalent expressions? A. 3(x+2) = 3x + 6 B. 3x + 2x = x²(x + 2) C. 3x + 2 = 3(x + 2) D. -3(2 + x) = -6x -

3

1 answer:

Sergio039 [100]3 years ago

8 0

C has equivalent expressions I think

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I need help with my assignment please help

Viefleur [7K]

Answer:

A

Step-by-step explanation:

find the area of the inner triangle and then multiply it by 4

3 0

3 years ago

Read 2 more answers

The expression cos 42° in terms of sine

GalinKa [24]

Answer:

$\because \: \cos \theta = \sin \: (90 \degree - \theta) \\ \\ \therefore \: \cos \: 42 \degree = \sin \: (90 \degree - 42 \degree) \\ \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = \sin \: 48 \degree \\ \\ \: \: \: \: \: \: \: \: \: \: \: \orange{ \boxed{ \therefore \: \cos \: 42 \degree =\sin \: 48 \degree}}$

8 0

3 years ago

100,000^1/5 x a + 1,000,000^1/2 x a

frez [133]

Answer:

1010a

Step-by-step explanation:

Mathematically, when a number is raised to a fraction, it simply means we are to find the root of that number to the denominator of the given fraction

For example;

100,000^1/5

= 5 x√((100,000) = 10

Likewise;

1,000,000^1/2 = √(1,000,000) = 1000

Thus, we have it that;

10 * a + 1000 * a

= 10a + 1000a = a(1000 + 10) = 1010a

4 0

3 years ago

a jug for a baseball team holds 20 gallons of water to make an energy drink one cup of mix is used for every 2 gallons of water

Solnce55 [7]

Assuming that the mix disolves into the 20 gallons and doesn't take up space

1:2
x:20
1/2=x/20
multiply btoh sides by 20
10=x

answer is 10 cups of mixture

5 0

3 years ago

PLEASE HELP!!!!! How many 4-digit numbers divisible by 5, all of the digits of which are even, are there?

saul85 [17]

Answer:

I assume you know Arithmetic Progression .

so, we have to find the first and last 4-digit number divisible by 5

first = 1000 , last = 9990

we have a formula, $a_{n}$ = a + (n-1)d

here, $a_{n}$ is the last 4-digit number divisible by 5.

n is the number of 4-digit even numbers divisible by 5

d is the common difference between the numbers, which is 10 in this case

a is the first 4-digit number divisible by 5

9990 = 1000 + (n-1)*10

899 = n-1

n = 900

Hence, there are 900 4-digit even numbers divisible by 5

7 0

3 years ago