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djverab [1.8K]
2 years ago
13

Three DVDs and four CDs cost $92. Two DVDs and three CDs cost

Mathematics
1 answer:
Vedmedyk [2.9K]2 years ago
8 0

Answer:

DVD: $16

CD: $11

Step-by-step explanation:

These two linear equations can represent the system of equations where x equals the cost of a DVD and y equals the cost of a CD:

3x+4y=92

2x+3y=65

When graphed, the solution is at (16,11).

Therefore, one DVD costs $16 and one CD costs $11.

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An equation parallel and perpendicular to 4x+5y=19
mestny [16]

Answer:

An equation parallel to 4x + 5y = 19 would be y = -4/5x +12.

An equation perpendicular to 4x + 5y = 19 would be y = 5/4x + 10.

Step-by-step explanation:

The equation given represents a linear equation in Standard Form (Ax + By = C).  Lines that are parallel to each other go the same direction and don't touch, so their slopes must be the same.  However, lines that are perpendicular go in opposite directions and intersect, so their slopes must be the direct opposite of each other.  In order to find the slope, you must first convert from the Standard Form given to Slope Intercept Form (y = mx +b).  When you solve the given equation for 'y', you get: y = -4/5x + 19, where the slope = -4/5.  To make a parallel equation, simply keep the same slope and choose a different y-intercept ('b').  To make a perpendicular equation, take the direct opposide of your slope 5/4 (positive) and choose a different y-intercept.  

8 0
3 years ago
HELP!!!! PLEASE SOMEONE SHOW ME HOW TO DO THIS PROBLUM!!! WILL GIVE BRAINLIST
Marrrta [24]

Answer:

C≈18.85 ft

this is the answer I think

6 0
3 years ago
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To ________ a formula or equation for a specified variable means to rearrange it so that the variable appears alone on one side
julia-pushkina [17]
Hello There! ^_^

Your question: To ________ a formula or equation for a specified variable means to rearrange it so that the variable appears alone on one side of the equal sign.

Your answer: To solve <span>a formula or equation for a specified variable means to rearrange it so that the variable appears alone on one side of the equal sign.
</span>
The answer is solve to fill up the blank.

Hope this helps!





7 0
3 years ago
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Plz help for financial algebra
serious [3.7K]

Answer:  $277.91

<u>Step-by-step explanation:</u>

The average of the 2 highest salaried quarters is:

\dfrac{\$13,500+\$12,775}{2}=\dfrac{\$26,275}{2}=\$3,137.50

Divide that by 26 (weeks) to find out her average weekly salary:

\dfrac{\$3,137.50}{26}=\$505.29

Multiply that by 55% (0.55) to calculate her weekly unemployment benefit:

\$505.29(0.55)=\$277.908

Round to the nearest penny --> $277.91

4 0
3 years ago
Whats 1x500 plsssssssssssssssssss
Ivenika [448]

Its 500

because anything that is getting multiplied by one is the same number.

7 0
3 years ago
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