Math Skills Challenge for Grade 7

Solve for x: 2x + 5 = 15

What is the ratio of 8 to 12 in simplest form?

Calculate the area of a rectangle with length 5 cm and width 3 cm.

If 3/4 of a number is 12, what is the number?

Find the perimeter of a triangle with sides measuring 5 cm, 7 cm, and 9 cm.

Solve for y: 4y - 8 = 16

What is the proportion of 2 to 5 compared to 4 to x?

Calculate the area of a circle with a radius of 7 cm (use π ≈ 3.14).

If a recipe requires a ratio of 2:3 for sugar to flour, how much flour is needed for 4 cups of sugar?

Solve for z: 5(z - 2) = 3z + 6