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nikitadnepr [17]
2 years ago
10

Need help on #7 help if u know how to solve thanks!

Mathematics
2 answers:
mash [69]2 years ago
8 0
7a) 302.5
7b) 302500
Hope this helps! :)
Elanso [62]2 years ago
8 0
This is a great method
I call it dot traveling
if you have 3.025 and 100 has 2 zeros you move your dot by 2 spaces so 302.5
next
if you have 10^5 you will need to look only at the five (note: this is ONLY on the number 10)
so we are going to move 3.025 by 5 spaces
notice how it doesnt have enough space? Add zeros!
So here 3.025 * 10^5 = 302500!
Hope I helped
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The diagonal of a cube is 28 cm. Identify the length of an edge. Round to the nearest tenth, if necessary. HELP PLEASE!!
makkiz [27]

Answer:

16.2\ cm

Step-by-step explanation:

we know that

The diagonal of a cube is equal to

D=b\sqrt{3}

where

b is the length of an edge of the cube

we have

D=28\ cm

substitute

28=b\sqrt{3}

b=28/\sqrt{3}=16.2\ cm

8 0
3 years ago
Tony and Cleo are donating some of their books to a hospital. If Tony contributes half of his books and Cleo gives one third of
liraira [26]
Short Answer: Tony 40 Cleo 30
Givens

T = Tony
C = Cleo

Equations
1/2 T + 1/3 C = 30      (1)
2/5 T + 1/2 C = 31       (2)

Adjustments
Multiply  (1) by 3
Multiply (2) by 2

New Equations
3/2 T + C = 90      (1a)
<u>4/5 T + C = 62</u>      (2a) Subtract (2a) from (1a)
(3/2 - 4/5)T = 28                      the common multiple of 2 and 5 = 10. 
(15/10 - 8/10)T = 28
7/10 T = 28                              Multiply by 10
7T = 28*10
7T = 280  Divide by 7
T = 280/7 = 40

Put T = 40 into (1)
1/2 T + 1/3 C = 30
1/2 (40) + 1/3 C = 30
20 + 1/3 C = 30                      Subtract 20 from both sides.
1/3 C = 30 - 20
1/3 C = 10                              Multiply through by 3
C = 10 * 3
C = 30

Answer:
Cleo has 30 books.
Tony has 40 books.

Check
<em>Use Equation 2</em>
2/5 T + 1/2 C = 31
2/5*40 + 1/2 * 30 = ? 31
16 + 15 =?3`
31 = 31 They are equal.

4 0
3 years ago
2. A square tent has a side with a length of<br> 4x2yzd feet. What is its area?
Nesterboy [21]

Answer:

6

Step-by-step explanation:

5 0
2 years ago
Please help ASAP! Will mark brainliest if correct :)
balu736 [363]

Answer:

12

Step-by-step explanation:

Your ratio is 24:8. This ratio simplified is 3:1. 4x3=12. x=12.

4 0
3 years ago
Read 2 more answers
What is the greatest common factor of theses variables
DerKrebs [107]
B is the answer!

Explanation:
m^2 n^2 fits into both, you can take m^2 n^2 out of it both.

m is a common factor since you can take m out of both but it’s not the greatest common factor.

2n & 2m wouldn’t even be a common factor bc there is no 2n or 2m in neither.
8 0
3 years ago
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