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Morgarella [4.7K]
3 years ago
7

Please help me! Thank you so much!

Mathematics
1 answer:
labwork [276]3 years ago
7 0
The answer is B for this question
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How many times does 5/8 go into 3 3/4?
muminat
5/8 times what=3 and 3/4
convert 3 and 3/4 to improper
3 and 3/4=3+3/4=12/4+3/4=15/4

5/8 times what=15/4
times both sides by 8/5
what=120/20
what=12/2
what=6

6 times
8 0
3 years ago
Janet is three years older than her sister julie. Janet’s brother is eight years younger than their sister Julie. The sum of all
SOVA2 [1]

Answer:

Julie is 20

Janet is 23

Their brother is 12

Step-by-step explanation:

20+23+12=43+12=55

8 0
3 years ago
Solve. Use the basic percent equation. 212.5 is 85% of what?
uranmaximum [27]

Answer:

250

Step-by-step explanation:

85% · n = 212.5

[convert 85% to .85]

.85n = 212.5

n = 212.5/.85

n = 250

6 0
3 years ago
The figure below shows the dimension of an arrow pointed on the pavement of a parking lot. The entire length of the arrow is 8.5
Elodia [21]
Letter b is the right answer choice
8 0
3 years ago
If a+b+c =0 show that a³+b³+c³= 3abc
slega [8]

Answer:

Step-by-step explanation:

a+b+c=0, a+b=-c,a+c=-b, b+c=-a

(a+b+c)^3=(a+b+c)^2*(a+b+c)=(a^2+b^2+c^2+2ab+2ac+2bc)*(a+b+c)=

a^3+ab^2+ac^2+2a^2b+2a^2c+2abc+a^2b+b^3+bc^2+2ab^2+2abc+2b^2c+a^2c+b^2c+c^3+2abc+2ac^2+2bc^2=a^3+b^3+c^3+3a^2b+3a^2c+3ac^2+3ab^2+3bc^2+3b^2c+6abc=

a^3+b^3+c^3+3a^2*(b+c)+3c^2(a+b)+3b^2(a+c)+6abc=

a^3+b^3+c^3+3a^2*(-a)+3c^2*(-c)+3b^2*(-b)+6abc=

a^3+b^3+c^3-3a^3-3c^3-3b^3+6abc=

6abc-2a^3-2b^3-2c^3=2(3abc-a^3-b^3-c^3)=

2*[3abc-(a^3+b^3+c^3)]=0

so 3abc-(a^3+b^3+c^3)=0

so a^3+b^3+c^3=3abc

7 0
3 years ago
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