Eight algebra questions (explanations would be appreciated):

Use substitution to solve the following:

1)

y=x²

y=x+2

2)

y=x²+3

y=4x

3)

x²+4y=1

y=x+1

4)

x²-3y=-2

y=4+x

5)

x²-2y=-4

y=6-x

6)

x²+4y=9

y=x-3

7)

x²+5y=16

y+x=2

8)

y=x²-6x

3x-y=-10

Estimate the sum to the nearest whole number: 0.870 + 3.2 A) 2 B) 3 C) 4 D) 5

Students in a middle school must choose to take either band or chorus. in a given academic year, 60% of the pupils choose band and the rest choose chorus. 30% of the students who are taking band are girls, and 70% who are taking chorus are girls.

What's the LCM OF 90 show your work

When evaluating data on a scatter plot what can be used to make predictions about the future? F. interpolation G. extrapolation H. correlation coefficient I. causation

What is the 9 in 9,905,482

The weight w of an object varies inversely as the square of the distance d from the center of the earth. At sea level (3978 mi from the center of the earth), an astronaut weighs 115 lb.

What does 3 over 4 times 2 equal?

Given: A, B, C, D are rt. 's Prove: AD| |BC AB| |DC Which of the following reasons could be used to conclude that the lines are parallel based on the given information? 1) If right angles are formed, then lines are parallel.

Solve each equation. 5x2 - 55 = 90

You eat 3/10 of a pack of hot dogs. Your friend eats 1/5 of the pack of hot dogs. What fraction of the pack of hot dogs do you and your friend eat?