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Mice21 [21]
3 years ago
5

Helena wants to paint a box in the shape of a cube with sides that are 18 inches long. what is the surface area that Helena will

paint?
Mathematics
1 answer:
yan [13]3 years ago
5 0

Answer:

1944 Inches Squared

Step-by-step explanation:

Surface area Formula for a Cube:

A = 6a^2

The "edge", which is also the side, is 18 inches.

a = 18

Solve the formula.

A= 6a^2 = 6(18)^2 = 6 * 18^2\\18^2 = 324\\324 * 6 = 1944\\A=1944

The cube's surface area should be 1944 square inches.

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Subtraction using ten facts
Nonamiya [84]
? what u r saying but think u r saying subtraction facts of 10. Right. 
10-0=10
10-1=9
10-2=8
10-3=7
10-4=6
10-5=5
10-6=4
10-7=3
10-8=2
10-9=1
That is all the basic subtraction 10 facts i know hope it helps.
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3 0
3 years ago
Small notebooks cost $3.50 and large notebooks cost $5.00. She needs to buy 31 notebooks, and she has $134 to spend. How many sm
Darina [25.2K]

Let's assume

number of small notebooks =x

number of large notebooks =y

we are given

total number of notebooks =31

so, we get

x+y=31

now, we can solve for y

y=31-x

we have

Small notebooks cost $3.50 and large notebooks cost $5.00

she has $134 to spend

so, we get

3.50x+5y=134

now, we can plug y

3.50x+5(31-x)=134

3.50x+5*31-5x=134

-1.5x+155=134

-1.5x+155-155=134-155

x=14

now, we can find y

y=31-14

y=17

so,

number of small notebooks is 14

number of large notebooks is 17.............Answer


6 0
3 years ago
Read 2 more answers
X <br> _ - 3 = -5 please help solve<br> 8
kirill [66]
-8-3=-5. there . thats the answer.
4 0
3 years ago
Select the term that best describes the statement.. . All angles are right angles or a triangle has four sides.. 1) conjunction.
nydimaria [60]

The <u>correct answer</u> is:


2) disjunction.


Explanation:


A conjunction is when two statements are connected by "and." These are not, so this is not a conjunction.


A disjunction is when two statements are connected by "or." These are; this is a disjunction.


A negation is the opposite of a statement.


A conditional is an if-then statement.

6 0
4 years ago
Read 2 more answers
How many significant Digits do the following measurements have? 209 m
Andrews [41]

Answer:

3 sig fig

Step-by-step explanation:

4 0
3 years ago
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