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Tresset [83]
3 years ago
7

Há quatro jovens numa sala eles têm em média 13 anos se entra na sala um rapaz de 23 anos qual passa a ser a média da idades do

grupo ?
Mathematics
1 answer:
SOVA2 [1]3 years ago
3 0

Answer:

i dont get it

Step-by-step explanation:


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It is 6 kilometers from chris's house to the nearest mailbox. how far is it in meters
mote1985 [20]
6 kilometers = 6000 meters


1 kilometer = 1000 meters
So, 1000 × 6
8 0
2 years ago
Y/a −b= y/b −a, if a≠b<br><br> solve for y
Kamila [148]

Answer:

y= ab    if a≠b

Step-by-step explanation:

y/a −b= y/b −a

multiply each side by ab to clear the fractions

ab(y/a −b) = ab( y/b −a)

distribute

ab * y/a - ab*b = ab * y/b - ab *a

b*y - ab^2 = ay -a^2 b

subtract ay on each side

by -ay -ab^2 = ay-ay -a^2b

by -ay -ab^2 =-a^2b

add ab^2 to each side

by-ay -ab^2 +ab^2 = ab^2 - a^2b

by-ay = ab^2 - a^2b

factor out the y on the left, factor out an ab on the right

y (b-a) = ab(b-a)

divide by (b-a)

y (b-a) /(b-a)= ab(b-a)/(b-a)    b-a ≠0   or b≠a

y = ab

5 0
3 years ago
What are the solutions to the equation 3(x – 4)(x + 5) = 0?
vesna_86 [32]
First you distribute the 3
(3x-12) (x+5)=0
then you set each equation equal to zero
3x-12=0 & x+5=0
then you solve for x
x =4, -5
7 0
3 years ago
Read 2 more answers
Unit 2 Equations<br>Evaluate the expression if a=2 b=4 c=8 ac= ? *<br><br>○16<br>○10<br>○8<br>○4​
kvv77 [185]

Answer:

16

Explanation:

a = 2

c = 8

ac

2 · 8 = 16

5 0
3 years ago
Read 2 more answers
The geometric mean of 4 and 16 is?<br><br> A. 64<br> B. 16<br> C. 12<br> D. 8
guajiro [1.7K]
The correct answer is D.8
5 0
2 years ago
Read 2 more answers
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