Question

Solve for x.
4(x-b)=x
A. b=4/3x
B. b=3/4x
C. x=4/3b
D. x=3/4b

Answer 1

medal will be given! :D

Answer 2

4x - 4b = x
-4b = x - 4x
-4b = -3x
4b = 3x
b = (3x)/4

Your answer is B.

Answer 3

Solve for y, then find the value of y when given x=-2
6x=7-4y
A. -12
B. 7/4
C. 19/4
D. 24

Answer 4

medal will be givin again

Answer 5

4y = 7 - 6x
y = 7/4 - 3x/2

f(x) = 7/4 - 3x/2
f(-2) = 7/4 - ( (3(-2) /2)
f(-2) = 7/4 + 3
f(-2) = 7/4 + 12/4
f(-2) = 19/4 <------- (Your answer is C.)

Answer 6

Solve for h.
A=1/2bh
A. 2A/b=h
B. 2A=b/h
C. h=1/2Ab
D. h=2Ab

Answer 7

medal will be given again

Answer 8

A = 1/2 b h
2A = b h
h = (2A)/b <----- (Your answer is A.)

Answer 9

Rearranged it's 2A/b = h which is the same from the question wants you to answer it in =)

Answer 10

Find the width of a rectangle with a perimiter of 90 and a length of 15.
A. 90
B. 15
C. 45
D. 30

Answer 11

thanks scott :)

Answer 12

that perimeter prob. was the last one.

Answer 13

medal will be given

Answer 14

Lets see. Area = l x b
Perameter = 2l+2b
Now you now that l = 15...
You also know that b = area / 15
Area = 15 x b
So b = 15b/15
So b = b.... o.o Duh??? Lol idk; maybe you can use what I've said and get somewhere??



Area = 15b
30 + 2b = 90
b = Area / 15
30 + 2(Area)/15 = 90.... 2(Area)/15 = 60
2 times the area = 60 x 15
Area = 900/2
Area = 450

Stay with me here xD

Back to the start
Area = l x b
450 = 15 x b
b = 450/15
b = 30

You might want to double check this! xD But I'm confident it's okey saying as it works out as a nice round number :3

Answer 15

Okay thanks!! :D