MATHEMATICS MIDDLE SCHOOL

[(3 x 3) - (30 = 6)] + (-27) - 13

Answers

Answer 1
Answer:

Answer:

-36

Step-by-step explanation:

[(3* 3)-(30/6)]+(-27)-13= \n\n

[9-5]-27-13= \n\n

4-40= \n\n

-36

Hope this helps!

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A 120 watt light bulb uses about 0.1 kilowatt of electricity per hour.if electricity costs $0.20 per kilowatt hour how much does it cost to have a bulb on for an hour?

Answers

A 120 watt light bulb uses about 0.1 kilowatt of electricity per hour.if electricity costs $0.20 per kilowatt hour. Let's solve how much does it cost to have a bulb on for an hour. => 120 watt = 0.1 kilowatt per hour which costs 0.20 per kilowatt per => 0.1 kilowatt per hour * 0.20 = 0.02 dollars in an hour.

Answer:

$0.02 is the cost to have the bulb on for an hour

Step-by-step explanation:

A 120 watt light bulb uses about 0.1 kilowatt of electricity per hour

We can assume 1 kilowatt per hour = 1 unit

So total units of electricity consumed in 1 hour = 0.1 × 1

= 0.1 kilowatt hour or 0.1 unit

Since cost of one unit or 1 kilowatt hour is = $0.20 per unit or kilowatt hour.

Therefore, total cost to have this bulb on for an hour = Number of units consumed by the light bulb × per unit cost

= 0.1×0.20

= $0.02

$0.02 is the cost to have the bulb on for an hour.

How many liters are equal to 39 kL?How many milligrams are equal to 4 cg?
and:
Use the common denominator to compare the fractions.
9/10 or 2/3
5/8 or 3/5
2/3 or 5/6
4/14 or 2/7
4/5 or 4/10
6/8 or 5/6

:)

Answers

.039 liters are equal to 39 kL
40 mG are equal to 4 cG

An electrician needs 3 1/4 rolls of electrical wire to wire each room in a house. How many rooms can he wire with 9 1/4 rolls of wire

Answers

Number of rooms can be wired by electrician is approximately 3

Solution:

Given that electrician needs 3(1)/(4) rolls of electrical wire to wire each room in a house

To find: number of rooms can he wire with 9(1)/(4) rolls of wire

From given information,

Rolls of wire needed for 1 room = 3(1)/(4) = (4 * 3 + 1)/(4) = (13)/(4)

Total rolls of wire = 9(1)/(4) = (4 * 9 + 1)/(4) = (37)/(4)

So number of rooms can be wired:

\text{ number of rooms }=\frac{\text{ total rolls of wire}}{\text{ wire needed for 1 room}}

\text{ number of rooms } = ((37)/(4))/((13)/(4)) = (37)/(4) * (4)/(13) = (37)/(13)

\rightarrow(37)/(13) = 2.84 \approx 3

Thus number of rooms can be wired is (37)/(13) or approximately 3 rooms

Question on area of a circle

Answers

The area formula of a circle is:
A = \pir²

given is the diameter = 44 ft so the radius is
r = (d)/(2) = (44)/(2) = 22 ft

Apply the formula
A = \pi(22)²
   = 484\pi ft²

Answer is the second options, B. 484\pi ft²
Please see the pic, I'd solved in it.

Write the word phrase that represents the following expression 14 divid 2

Answers

The quotient of 14 divided by 2.
I think you do 14 divided by 2

Please answer my question I give thanks

Answers

N is a variable
1. N+4
2. dk
3. N*5
4. N-7
5. N^2 (N squared) +1
6. 3-N^2
7. N^2÷6=42
8. 2×N+5=20
9. 4×N-7=32
10. dk
11. 10+N÷2=-15
12. dk
some of them might not be correct, i did my best. i am sorry. 

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