10. find the value of x. the diagram is not to scale.

The value of x is 22°

Step-by-step explanation:

STR = (5x-40)°[isoceles triangle]

STR + STU = 180°[straight line angle]

5x° - 40° + 5x° = 180°

10x° = 220°

×° = 220/10

x° = 22°

(Correct me if i am wrong)

18.8 cubic inches.

step-by-step explanation:

volume of a cone = πr²h

r = 1.5 inches

h = 8 inches

pi = 3.14

volume of our cone = × 3.14 × 1.5² × 8 = 18.84 square inches

or equals to 18.8 square inches rounded up to nearest tenth.

x = 10.1

step-by-step explanation:

all of the angles of a tirangle add up to 180º

180 - 65 = 115 (since we already know the value of one angle)

(2x + 7) + (8x + 7) = 115

(combins like terms) 10x + 14 = 115

(isolate the variable subtract 14 from both sides): 10x = 101

(find the variable divide both sides by 10): x = 101/10

x = 10.1