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Which of these numbers is a prime number 1, 11, 21, 51?

How do you evaluate #3\cdot (  5)  ( (  2) ^ { 3}  2) ^ { 2}#?

How do you simplify #(root4(5))/(4root4(27))#?

How do you evaluate #13 5#?

How so you multiply #\frac { 3} { 8} \times \frac { 16} { 21}#?

How do you evaluate #12/(abs(1)+1#?

How do you evaluate #23+30#?

What is the mass of one atom of magnesium in grams?

How do you evaluate #4.246\times 4.246#?

How do you evaluate #3.3\div 3#?

How do you simplify #[78\div 13] ^ { 2}  8\cdot 3#?

How do you simplify #15.98+26.37#?

Paula bought a ski jacket on sale for $6 less than half its original price She paid $88 for the jacket. What was the original price?

For what values of x is the product (x+4)(x+ 6) positive?

What is the greatest common factor of both 9 and 12?

Gabby has 5 weeks to read a novel. She reads 15 pages of a novel in 3/7 week. At this rate, will Gabby finish the 200page book in time?

How do you evaluate #\frac{50}{5}#?

How do you simplify #5 8#?

A store owner bought a painting for $120. She is selling it for $190. What is the percent markup on the painting?

How do you evaluate #12+ 4^ { 2} \times 3 9#?

How do you divide #\frac { 7.34\times 10^ {  2} } { 7\times 10^ { 1} }#?

How do you solve #3x  5= 3( x  1) + 7#?

How do you evaluate #(8)(3)(9#)?

How do you subtract #7 4#?

Of the 6.25 billion people in the world, 310 million live in North America. What percent of the world's population lives in North America?