Subtract the 15 from the 133
you get 118
divide 29.50 from the 118
you get 4
4 people went to the concert
Answer:
4
Step-by-step explanation:
f(-1)=-2(-1)+2
f(-1)=2+2
f(-1)=4
Hello from MrBillDoesMath!
Answer: 9
Discussion
By the Pythagorean theorem, the length of the third side (the hypotenuse) in the triangle with sides 4 and 6 is sqrt ( 4^2 + 6^2) = sqrt (52)
Applying Pythagoras to the left most triangle (sides, x and 6) gives:
x^2 + 6^2 = m^2 (I am calling the unknown side "m)
Finally, in the big right triangle (the one containing the two right triangles)
(x + 4) ^2 = (sqrt(52)) ^2 + m^2
OK! Subtract the first equation from the second:
(x+4)^2 = 52 + m^2
x^2 + 36 = m^2
-----------------------------------------------------
( x+4)^2 - x^2 - 36 = 52 + (m^2 - m^2) =>
x^2 + 8x + 16 - x^2 -36 = 52 =>
x^2 - x^2 + 8x + 16 -36 = 52 =>
0 + 8x - 20 = 52 =>
8x = 72 =>
x = 9
Thank you,
MrB
Answer:
19
Step-by-step explanation:
Add 9 to 10
3(2d - 7) = (2 + 4d)2
distribute
3*2d -3*7 = 2*2 +2*4d
multiply
6d -21 = 4 +8d
subtract 6d from each side
6d-6d-21 = 4 +8d-6d
-21 = 4+2d
subtract 4 from each side
-21 -4 =4+2d-4
-25 =2d
divide by 2
-25/2 =d
