4/9 is the multiplicative inverse of which number

a - 4/9

b - 9/4

c 4/9

d 9/4

Mason and Nora decided to swim across the river. Mason began swimming 7.7 seconds earlier than Nora. Mason swam at a speed of 5 feet per second. Nora swam at a speed of 5+1 feet per second.

Amy spends 1/3 of her time working on math and 1/4 working on science. How much time does she spend on history?

Solve. 6 (2x - 4) > 3 + 2x

Pick the description of the line x + 3y=1? It vertical or horizontal?

Marisa has $40 in her savings account and plans to save $x each day for 5 months. Write two equivalent expressions to represent the total amount she will have saved after 5 months.

Slingerland borrowed $8,000 on july 20, at 11% interest. if the loan was due on october 17, what was the amount of interest on the loan using the exact interest method?

One year the price of wheat was $8.87 the next year the price was $9.60 route is the price per bushel of wheat for each year to the nearest tenth of a dollar

F (x) = 71 (0.93) ^2x growth or decay

A lawn is in the shape of a right triangle with a perimeter of 215 feet. The lengths of the sides of the triangle are each multiplied by 7. What is the perimeter of the new triangle? A. 1505 ft. B. 6100 ft. C. 7120 ft. D. 8640 ft.

Given w (x) = 3x+8, find w (2b+6)