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Lilit [14]
3 years ago
13

Simplify: 22 + 6(3) – 7 Simplify: 5x − 2y + 3z − 2x − y + 4z

Mathematics
1 answer:
guapka [62]3 years ago
3 0

Answer:

1. 33

2. 3x - 3y + 7z

Step-by-step explanation:

combine like terms on the second one.

3x - 3y + 7z

solve for the first one 22 + 18 - 7

18 - 7 = 11

11 + 22 = 33

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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
2 years ago
Which represents the inverse of the function f(x)=4x
liraira [26]
The answer will be F^-1= x/4
5 0
3 years ago
55565.87 in scientific notation​
mihalych1998 [28]

Answer:

5556587 x 10^-2

6 0
3 years ago
What value makes x - 7 = -6 equation true?
Bumek [7]

Answer:

x=1

Step-by-step explanation:

In order to solve this equation, we must add 7 to each side. This gives us x=1

x-7=-6\\\\x=1

4 0
3 years ago
A tower made of wooden blocks measures​ 114 feet high. Then a block is added that increases the height of the tower by 8 inches.
satela [25.4K]

Answer:

4. 23 in

Step-by-step explanation:

The tower is 1 1/4 feet high, then 8 inches are added. Well, we can't just add those two numbers. We have to change the units! Change everything to inches.

1 1/4 feet is equal to 12 inches + 3 inches = 15 inches, because a foot = 12 inches.

Add 8 inches to 15, and you get 23 inches.

<u>The answer is 4. 23 in. </u>

4 0
3 years ago
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