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What is the value of x?

80

Step-by-step explanation:

70, 30 and x are interior angles of a triangle.

Note : -

Sum of interior angles in a triangle is 180.

30 + 70 + x = 180

100 + x = 180

x = 180 - 100

x = 80

80 degrees

Step-by-step explanation:

The sum of angles must equal 180 degrees.

70+30=100

180-100=80

therefore, 80 is the answer

the ratio of grapes to blueberries she should use is 12: 3

step-by-step explanation:

if mandie is making 15 cups of fruit salad, the ratio of grapes to blueberries she should use is 12: 3.

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is