Find the value of the expression 21 - 2a if a = 3

Write the ratio in lowest terms in order to decide whether the proportion is true or false. 10/15=5/6

Multiply and simplify. 3xy4z2⋅5x2yx

Find the measure of A. 254 B. 53 C. 106 D. 127

Draw or write to show that the number 18 is even

Randy is on a diet. If Randy loses approximately 3 pounds a week, which of these choices is a reasonable estimate of the amount of time it will take her to lose 17 pounds

The table of values below shows data for a five-word spelling test. Number of Letters vs. Percentage who Spelled Correctly Word Number of letters in the word Percentage of students who spelled the word correctly 1 7 48 2 9 12 3 5 73 4 6 59 5 8 27

Would this be a reflection, dilation, rotation, or a translation? (a, b) → (b, - a)

15 Aman's annual salary is $45 000. His tax free allowances total $13 000. He has to pay a tax of 35% on his taxable income. The tax payable is (A) S4 550.00 (b) $11 200.00 (C) $15 750.00 (d) $20 300.00

Which expression is equivalent to 36x 12?

Solve each equation. 5x2 + 500 = 844.45