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professor190 [17]
3 years ago
14

Evaluate the expression 72/x2-2 for x=3

Mathematics
1 answer:
Rzqust [24]3 years ago
7 0

Answer:46

Step-by-step explanation:

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1st blank column:11

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2 to the Third power -(30÷5) +9
OLga [1]

Answer:

11

Step-by-step explanation:

2^3-(30/5)+9

First, you divide 30/5 because it is in parentheses and we are following this rule for order of operations:

P- parentheses

E- exponents

M- multiplication

D- division

A- addition

S- subtraction

so 30/5 = 6 and plugged in is:

2^3-(6)+9

Next, we do exponents:

2^3 = 2x2x2 = 8

plugged back in:

8-(6)+9

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8-6=2

2+9=11

11 is your answer

8 0
3 years ago
How to factorise 24x+3
yan [13]
The first thing to do is to work out the biggest number that goes into bother 24 and 3.  As the only that goes into three- other than 1- is itself, one can assume this is the number we are looking for.  

Next, divide bother numbers by 3. 
24 / 3 = 8
 3 / 3 = 1

You now take 3 out of the brackets, and leave 8 and 1. 24x / 3 = 8x. 

3(8x + 1)

7 0
3 years ago
Dakota wants to build 8 birdhouses, he needs to point 6 square feet of plywood, for each birdhouse is the plywood cause $0.56 pe
Westkost [7]

Answer:

$26.88

Step-by-step explanation:

Cost of a ply wood = $0.56 per square foot

If Dakota wants to build 8 birdhouses and he needs to paint 6 square feet of plywood for each birdhouse, then the total area fir the 8 bird house will be expressed as:

8 * 6

= 48 sq. feet

Hence the area of 8 bird houses is 46sq. feet

Next is to calculate the amount it will cost to make the 8 bird houses.

Since 1 sq. foot = $0.56

48 sq. feet = y

cross multiply

y * 1 = 48 * 0.56

y =  26.88

Hence it will cost Dakota $26.88 to make hid bird houses

3 0
3 years ago
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