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Karolina [17]
3 years ago
9

How do i simplify this expression?3(a-7)=?​

Mathematics
1 answer:
kolbaska11 [484]3 years ago
3 0

Answer: 3a-21

Step-by-step explanation:

Apply distributive property

a=3-3*7

Multiply 3*7=21

Answer: 3a--21

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Solve each inequality and graph its solution.
ra1l [238]

Answer:

8) No solution

9) n > -5 <em>(View explanation for info on how to graph)</em>

Step-by-step explanation:

<em><u>Question 8</u></em>

<em><u /></em>

<u>24+6k < -6(-4-k)</u> - Solve and graph

1) Distribute -6 to -4 and -k:

24+6k < 24+6k

2) Subtract 6k from both sides:

24<24

^ We know the following is false, therefore there is no solution to question 8.

<em><u>Question 9</u></em>

<em><u /></em>

<u>-2n-40 < 5(6+n)+7n</u> - Solve and graph

1) Distribute 5 to 6 and n:

-2n-40 < 30+5n+7n

2) Combine alike terms:

-2n-40 < 30+12n

3) Add 2n to both sides:

-40 < 30+14n

4) Subtract 30 from both sides:

-70 < 14n

5) Divide both sides by 14:

n > -5

6) To graph, plot an OPEN CIRCLE (<em>don't fill in the circle)</em> at point -5 and then draw an arrow pointing to the right!

Let me know if you need any help with the others :)

5 0
3 years ago
On a road trip, a family drove 60 miles per hour for their entire trip. Which of the following rates could they have been drivin
nydimaria [60]

Answer:240 miles in 4 hours

Step-by-step explanation:

6 0
3 years ago
Find the area of a circle with radius, r = 19cm.<br> Give your answer rounded to 3 SF.
Svet_ta [14]
1130cm square
Area formula is pixr^2
Pi x 19^2 = 1134.1149...
4 0
3 years ago
Rachel runs 3.2 miles each week day and 1.5 miles each day of the weekend. how many miles will she have run in six weeks?
Tatiana [17]
3.2 x 5 = 16

1.5 x 2 = 3

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Rachel will run 114 miles in 6 weeks.
6 0
3 years ago
Read 2 more answers
Directions: Given the function, find each function value. Write
serg [7]

Answer:

1. f(0) = -2, f(2) = 0, f(3) = 1

Step-by-step explanation:

Substitute the numbers given for f(x) for the x in the function f(x) = 1(x-2)

so f(0) = 1(0-2) = 1(-2) = -2

f(2) = 1(2-2) = 1(0) = 0

f(3) = 1(3-2) = 1(1) = 1

Now you try the rest

5 0
3 years ago
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