1,090 Answered Questions for the topic Math Equations

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 ?
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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.) 
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Math Equations

04/17/13

Use the distributive property to rewrite the expression.
(a+3)5= (Simplify your answer.)
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Math Equations

04/17/13

Find the value of y for the given value of x.
y=x+5, x=7 y=?
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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
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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
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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
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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.)
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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?
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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.)
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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
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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.)
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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.
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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.)
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Math Equations

04/17/13

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

04/16/13

9+15÷5×13=
9+15÷5×13=
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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
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Math Equations

04/12/13

Evaluate the expression. Write the answer in standard form.
(-4 x 10^-6) (2 x 10^4) =?
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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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Math Equations

04/12/13

Write the expression in standard form
7.8 x 10^6  
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Math Equations

04/12/13

Divide and simplify
x^16/x^3 (Simplify your answer. Type exponential notation with positive exponents.) 
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Math Equations

04/12/13

Simplify this
(2/5)^-3 (Simplify your answer. Type a fraction or mixed number.)
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Math Equations

04/12/13

Use the formula for compound interest to find A
A= P(1+r^n) P=$30,000,r=0.14, and n= 3years At the end of 3 years A is how much in dollars ? (round to the nearest cent) 
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Math Equations

04/12/13

Find the volume of the figure
given the measurements are 5x^2, 4x^3, 2x^4 What's the volume ? (Simplify your answer and type exponential expression.)
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