7/8 of a number is 49 find the number

If a rock is thrown upward on the planet Mars with a velocity of 10 m/s, its height (in meters) after t seconds is given by H = 10t - 1.86t2. Find Velocity after 2 seconds. Find velocity of rock when x=a. When rock hits surface?

Carlos needed to draw two lines at a 90 degree angle to continue the grid that he was making. Which is an equation of a line that is perpendicular to line MN?

A man bought 2220 mangoes at #5X. he sold each for #3 X kobo and made a gain of #8. find the value of X?

The city subway is being extended to include a new stop in a large open plaza. The entrance to the new stop needs to be both architecturally distinctive and energy efficient, and it must fit within the budget.

Which of the following are true statements. The lengths 14, 24 and 26 can not be sides of a right triangle. The lengths 30, 72, and 78 can be sides of a right triangle. The lengths 14, 24 and 26 can be sides of a right triangle.

Which inequality statement describes the two numbers on a number line? "-13 and a number 18 units to the right of - 13"

If there are 210 student and only 46 students get a permission slip to holiday hills what is the percent of the student who did not receive permission slips?

500 in the ratio 2:3

Eliana drove her car 81 km, space, k, m and used 9 liters of fuel. She wants to know how many kilometers (x) she can drive on 22 liters of fuel. She assumes her car will continue consuming fuel at the same rate.

Each month, the census bureau mails survey forms to 250,000 households asking questions about the people living in the household and about such things as motor vehicles and housing costs.