Answer:
b=16
Step-by-step explanation:
Formula~ 1/2*b*h
1/2*15*b=120
7.5b=120
b=120/7.5
b=16
(you can substitute the value to check-i've done it below)
1/2*16*15=?
if you work it out, the ans will be 120, therefore the ans is correct!
Answer:
A. x = 3, y = -3
B. a = -2, b = 5
C. try your best ill see u later
Step-by-step explanation:
Okay I'mma state some stuff first 3^a + 3^b = 3^(a+b)
and 3^a/3^b = 3^(a-b)
So first equation 3^3*3^-3=3^0
So second equation 3^3/3^-2 = 3^5
So third equation I dont really know the rule but I'mm just plug in a random number for g, like 2, then solve the thing like a normal equation.
So 3^-3 x f^-3 = 12^2 = 144, f^-3 = 144/(3^-3 or 1/27) = 144 x 27 = 3888
so f^-3 = 3888, f = well its an imaginary number according to calculator so u try your best on the last one
Answer:
a : b = 19 : 7
Step-by-step explanation:
Given
4a - 5b : 5a + 4b = 1 : 3
Expressing in fractional form, that is
= ( cross- multiply )
3(4a - 5b) = 5a + 4b ← distribute left side
12a - 15b = 5a + 4b ( subtract 5a from both sides )
7a - 15b = 4b ( add 15b to both sides )
7a = 19b ( divide both sides by 7 )
a = b ( divide both sides by b )
=
That is a : b = 19 : 7
Step-by-step explanation:
1. area π(7.1)(7.1)= 158.37
Circumference 2π(7.1)= 44.61
2. area = 113.10
C = 37.70