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1,070 Answered Questions for the topic Math Equations

Math Equations

04/17/13

If the width of a rectangle is 8 inches and its perimeter is 42 inches, find the length of the rectangle.

The length of the rectangle is what in inches?
Math Equations

04/17/13

A barrel contains 190 gallons of water and is being drained at a constant rate of 14 gallons per hour.

Type an equation that models the number of gallons, g, after t hours  The equation that models the given situation is ?
Math Equations

04/17/13

An investor invested a total of $2,100 in two mutual funds.

One fund earned a 6% profit while the other earned a 2% profit. If the investor's total profit was $74, how much was invested in each mutual fund? The amount invested in the mutual fund that... more
Math Equations

04/17/13

Use symbols to write the expression and then evaluate it.

Four squared divided by two to the fourth power. (Type exponential notation with positive exponents.)  
Math Equations

04/17/13

The cost of driving a car includes both fixed costs and mileage costs.

Assume that it costs $171.90 per month for insurance and car payments and $0.27 per mile for gasoline, oil, and routine maintenance. (a) Find values for m and b so that y=mx+b models the monthly... more
Math Equations

04/17/13

The number N of state and federal inmates in millions during year x,

Where x>2002 can be approximated by the following formula. N=0.05x-99.05 Determine the year in which there were 1.2 million inmates. It was in the year ?
Math Equations

04/17/13

Use the method of substitution to solve the system of linear equations.

4x-y=2 9x-2y=7 The solution is what? (Type an ordered pair.) 
Math Equations

04/17/13

Use the distributive property to rewrite the expression.

(a+3)5= (Simplify your answer.)
Math Equations

04/17/13

Find the value of y for the given value of x.

y=x+5, x=7 y=?
Math Equations

04/17/13

Use the elimination method to solve the system of equations.

a+8b=3 a+2b=-3 Select the correct choice below and if a is the correct choice write out the answer and simplify your answer and write an ordered pair again only if a is the correct answer. (a)... more
Math Equations

04/17/13

Write the function as a set of ordered pairs. Give the domain and range of f.

f(a)=t, f(b)=p, f(c)=r, f(d)=t f=? (Type ordered pairs. Use a comma to separate answers as needed.) Domain is ? (Type ordered pairs. Use a comma to separate answers as needed.) The range is ?... more
Math Equations

04/17/13

Translate the pharse into a mathmatical expression and than simplify.

Seven times a number decreased by twice the same number. (a) Write the corresponding mathematical expression. (Type an expression using x as the variable do not simplify.) (b) The simplified... more
Math Equations

04/17/13

Using the formula A=lw, find the area of the rectangle

The length and width given are 2x^3 and 4x^3 The area is what? (Type a simplified exponential expression.)
Math Equations

04/17/13

Use the formula d=rt to find the value of the missing variable.

d=195 feet, t=39 seconds r=what in feet/seconds?
Math Equations

04/17/13

Parking in a student lot costs $1 for the first half hr and $1.50 for each hr thereafter.

A partial HR is charged the same as a full HR. What is the longest time that a student can park in this lot for $9? (Simplify your answer.)
Math Equations

04/17/13

The table lists the percentages of household that were 3-person households during selected year.

           Year:                     1970       1980      1990     2000           Percentage:             17.3        17.5       17.5      16.6     (a) What was this percentage in 2000? (Type an... more
Math Equations

04/17/13

Find the slope-intecept form for the line satisfying the following conditions.

x-intercept 3, y-intercept 1/5 (Type an equation. Use integers or fractions for any numbers in the equation.)
Math Equations

04/17/13

Find the slope, if it exists, of the line containing the pair of points.

(-19, -7) and (-20, -8) Select the correct choice below and if necessary, type out the answer to complete your choice. (a) The slope is ? (b) The slope is undefined.
Math Equations

04/17/13

Simplify the expression

0.5x^2+0.4x^2-0.2x^2 (Use integers or decimals for any numbers in the expression.)
Math Equations

04/17/13

Simplify the expression

(-4p^4=? (Simplify your answer)
Math Equations

04/17/13

A certain mountain has an elevation of 19,545 feet.

In 1918, the glacier on this peak covered 9 acres. By 2002 this glacier had melted to only 1 acre. (a) Assume that this glacier melted at a constant rate each year find this yearly rate? (Type a... more
Math Equations

04/16/13

9+15÷5×13=

9+15÷5×13=
Math Equations

04/12/13

A family refers to a group of two or more people related by birth, marriage, or adoption who reside together.

In 2000, in Country A, the average family net worth was $410,000, and there was about 6.1 x 10^7 families. Calculate the total family net worth Country A in 2000. Country A's total family net... more
Math Equations

04/12/13

Evaluate the expression. Write the answer in standard form.

(-4 x 10^-6) (2 x 10^4) =?
Math Equations

04/12/13

A moon is about 240,000 miles from the planet orbits.

(a) Write this number in scientific notation. (b) If a rocket at 6 x 10^4 miles per hour, how long would it take for it to reach the moon from the planet. (Use the multiplication symbol in the... more

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