.be, mg, ca, sr
which of the following about the elements is true?

a. all of them are unreactive metalloids.

b. all of them are hard and dense metals.

c. be and mg are hard and dense metals and ca and sr are unreactive metalloids.

d. be and mg are unreactive metalloids and ca and sr are hard and dense metals.

answer:

d

step-by-step explanation:

$18 was the price of the t-shirt

step-by-step explanation:

5x+40

5(x + 8)

7x - 49

7(x - 7)

18x + 9

9(2x + 1)

15x - 10

5(3x - 2)

step-by-step explanation:

for number one all you have to do is factor 5 out of 5x + 40

for number 2 factor 7 out of 7x - 49

for number three factor 9 out of 18x + 9

for number four factor 5 out of 15x - 10