Answer:
23
Step-by-step explanation:
Angles x and 157 are linear pairs,
x + 157 = 180
x = 180 - 157
x = 23
Answer:
AC=
Step-by-step explanation:
AC is the base, BC is the hypotenuse, so the side length is AB.
We are given that AC=7 units, and BC is equal to 8.
Thus we have 8^2-7^2=(AB)^2
64-49=(AC)^2
15=(AC)^2
AC=
Answer:
make Y the subject in eqn........ 1
y + 7 = 2x
y = 2x - 7...........eqn 3
put y = 2x - 7 into eqn 2
x² - xy + 3y² = 15
x² - x(2x - 7) + 3(2x - 7)(2x - 7) = 15
x² - 2x² + 7x + 3(4x² + 14x -14x + 21) = 15
x² - 2x² + 7x + 12x² + 42x - 42x + 63 = 15
x² - 2x² + 7x + 12x² + 63 = 15
x² - 2x² + 12x² + 7x + 63 = 15
11x² + 7x + 63 - 15 = 0
11x² + 7x + 48 = 0
11x² + 7x = - 48
11x²/11 + 7x/11 = - 48/11
x² + 7x
The formula is
I=prt
I interest earned 40
P principle 500
R interest rate?
T time 2 years
Solve the formula for r by dividing both sides by pt to get
R=I/pt
R=40÷(500×2)
R=0.04×100
R=4%
Hope it helps!
(2x+1)^2
=(2x+1)(2x+1)
=4x^2+2x+2x+1
=4x^2+4x+1
