1. which expression has a value of 30 when x = -1 and y = 3?
a. (x - 3^2) · y - 6
b. (x - 3^2) · (y - 6)
c. x - 3^2 · (y - 6)
d. x - 3^2 · y - 6

2. which expression has a value of -18?
a. (6^2 + 2) - 8 \sqrt{81}
b. 6^2 + (2 - 8) \sqrt{81}
c. (6^2 + 2 - 8) \sqrt{81}
d. 6^2 + 2 - (8 \sqrt{81})

3. what is the value of the expression 5 + (3 · (2 - \sqrt{81}
a. -16
b. 1
c. 2
d. 7

4. which expression has a value of 26 when a = 4 and b = 5?
a. a \sqrt{16} + b - 10
b. a (\sqrt{16} + b) - 10
c. a \sqrt{16} + (b - 10)
d. (a \sqrt{16}) + b - 10

5. what is the value of the expression (c^2 + d^2) - 2(c^2 - d^2), when c = 3 and d = 2?
a. -23
b. -3
c. 3
d. 23

6. which expression has a value of 66?
a. (7^2 - 8) · 2 - 16
b. 7^2 - 8 · (2 - 16)
c. 7^2 (- 8 · 2) - 16
d. 7^2 - 8 · 2 - 16

7. what is the value of the expression y ÷ \sqrt{9} - x^3 · y, when x = 2 and y = 6?
a. -46
b. -36
c. 36
d. 46

8. what is the value of the expression 4(\sqrt{p} + q^2), when p = 49 and q = -2?
a. 12
b. 20
c. 36
d. 44

me

i belive those are the ones that are under 90 degreese.

3

step-by-step explanation:

in standard form:

a= dictionaries

b= maps

you have to buy 3 dictionaries, so put a 3 next to the a (dictionaries) so that you can multiply them by each other.

a3+b= 60 (the amount of money you have)

we already know the cost of a=15 so replace a with $15

($15 x 3)+b=60

multiply 15 and 3 to get $45 and replace it with $45

45+b=60

and then replace b with 15 to get the total:

45+15=60

that means you have $15 left after buying 3 dictionaries.

15 divided by the cost of a map ($5) equals 3.

so you can buy 3 maps.

sorry if it was confusing!

125 yards

step-by-step explanation:

i take 75 plus 50.

option: d is the correct answer.

d) none of the above.

step-by-step explanation:

clearly from the figure attached to the question we could see that there is no shape given. hence without any shape given in the figure and after rotation we can't obtained a square pyramid.

since, to obtain a image we need a proper figure of the pre-image so that it can be transformed.

hence, the correct answer is:

d) none of the above.

step-by-step explanation: