Question

Can someone please check my answers and help/explain #4

Answer 1

Answer:

(0,8)

Step-by-step explanation:

To get the y-intercept put all x values equal to 0 (because we want to see where y lies on the graph when x is zero.

y=2^0+3

y=2^3

y=8

The y-intercept is (0,8)

As for the rest of the answers.....

1)A) 2$\sqrt{12}$-5$\sqrt{3}$ = 4$\sqrt{3}$-5$\sqrt{3}$ so the final answer is -$\sqrt{3}$

1B) the problem is (3-$\sqrt{7}$)(3+$\sqrt{7}$) a quick formula to help you solve this type of problem is (a-b)(a+b)= a^2-b^2 so you transform the question to 3^2-$\sqrt{7}$ ^2

to get 9-7 which is 3 therefore the final answer is 3

2) when you transform a function from y=x^2-3 to y=x^2+1 the graph moves 4 units up. So the final answer is b)4 units up

Question 3a and 3b are correct