Michael has a summer job as a bricklayer’s assistant. He is responsible for mixing the concrete. Concrete is made of cement, sand, and gravel in a ratio of 1:3:4 by mass. Michael needs to make 80 kg of concrete. How much cement, sand, and gravel does Michael need to mix together to make 80 kg of concrete?

Step-by-step explanation:

80 / 12 = 6 2/3, so a twelfth of 80 is 6 2/3.

Cement:

6 2/3 * 1 = 6 2/3

Sand:

6 2/3 * 3 = 18 6/3 = 20

Gravel:

6 2/3 * 4 = 24 8/3 = 26 2/3

the answer is the option b

the range is all real numbers

step-by-step explanation:

we know that

the absolute value parent function is equal to

see the attached figure to better understand the problem

so

a. it is v-shaped > is true

b. the range is all real numbers > is not true

because the range is the > [0,∞)

all real numbers greater than or equal to zero

c. it goes through the origin > is true

d. the domain is all real numbers > is true

step-by-step explanation:

d. it is a convex pentagon because it has five sides and none of the sides would extend into the inside of the polygon.

step-by-step explanation: