He made a mistake at step 3. He should subtract 15 from both side instead of adding 15 to both side.
Answer: C
The standard form of a circle is:
Your center is and your radius is
Plug them into the equation and you get
The correct answer is D.
If C=2pi times r, then r=C divided by 2pi, just use your calculator, punch in 53.4 ÷ 2 ÷3.14, the answer should be 8.5
Answer: it's C Sophie used the wrong height for the pyramid
It's Right cause I took the test.
Step-by-step explanation:
Answer:
x = 7 , y = 2
Step-by-step explanation:
It is a linear equation in 2 variables so it can have infinite solutions
Put x=7 Then,
7 - 3y = 1
-3y = 1-7
-3y = -6
y = -6/-3 = 6/3
y = 2