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PtichkaEL [24]
3 years ago
8

How do I set up proportion’s and also cross multiply

Mathematics
1 answer:
xenn [34]3 years ago
6 0

Answer:

u transpose all the constans to one side of the '=' sign and solve

Step-by-step explanation:

for example,

in  the first question

the sides of the triangles are proportional then,

25/30 = x/ 10

=> (25x10)/30 = x

=> 250/30 = x

=> 8.33

im pretty sure like this u can do the rest, ;)

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(x+5) (×+5)=49. I need to know what x is, how do I solve this?
Archy [21]
(x+5)^2=49
squaer root both sides
x+5=+/-7
minus 5 both sides
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x=-5+7=2
x=-5-7=-12


x=2 or -12

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3 years ago
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A company makes t-shirts and their research shows that that price and demand are related linearly: p = mx + b. They know that in
loris [4]

Answer:

P= -2x +46

Step-by-step explanation:

the relation between price and demand is

P= mx +b ........................1

when demand is 10 shirts price is $26

when demand is 20 shirts price is $6

firstly put P= 26 and x= 10 in 1

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secondly put x= 20 and P= 6 in 1

6= 20m + b ............................3

solving  2 and 3 we get

m = -2

putting this value of m in either of 2 and 3 to get b

b= 46

so the final relation obtained by putting m= -2 and b= 46 in 1 we get

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4 0
3 years ago
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