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laila [671]
3 years ago
8

Number 7 please! I need help badly

Mathematics
1 answer:
melamori03 [73]3 years ago
7 0

Answer:

A computer costs $225 and a printer $150.

Step-by-step explanation:

Let c be the cost of a computer and p the cost of a printer, then:

3c + p   = 825

4c + 2p = 1200

Multiply the first equation by -2:

-6c - 2p = -1650

Add this to the second equation:

-2c = -450

c = 225.

Now substitute  c = 225 in the first equation:

3*225 + p = 825

p = 825 - 675 =  150.

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Number 2 and please provide a step by step explanation!!!!
Alekssandra [29.7K]

The number of students in 5th grade is 60, since 24% of 250 is 60.

Since 90 is 38% if 250, 38 is going to be the percent of all students in sixth grade.

20% of 250 is 50, so the percent of all students in seventh grade is 50.

Finally, 45 is 18% of 250, so 18 percent of all students are in eight grade.

Hope this helped :)

8 0
2 years ago
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Matthew walks 5/8 mile to the bus stop each morning how far will he walk in 5 days
Scrat [10]
Matthew will walk 3 \frac{1}{8} miles to the bus stop in 5 days.
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2 years ago
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Kyle had 1/3 of a large pizza left. He wants to split it with his
barxatty [35]
They will each get 1/6 of the pizza.
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2 years ago
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What is m angle ABC​
victus00 [196]

Answer:

3rd option: 60 degrees

Step-by-step explanation:

We can see in the diagram that the angle on C is a supplementary angle, which means that the sum of 135 and internal angle will be equal to 180 degrees.

Let x be the internal angle,

Then

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x = 45 degrees

So now we know that two interior angles of the triangle.

Also we know that sum of all internal angles of triangle is 180 degrees.

Using the same postulate:

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third option is the correct answer ..

6 0
3 years ago
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What is the slope of a line perpendicular to the line whose equation is 6x+4y=-56
alex41 [277]

Answer:

First, put the equation of the line given into slope-intercept form by solving for y. You get y = -2x +5, so the slope is –2. Perpendicular lines have opposite-reciprocal slopes, so the slope of the line we want to find is 1/2. Plugging in the point given into the equation y = 1/2x + b and solving for b, we get b = 6.Step-by-step explanation:

|\   /|

 \|_|/

 /. .\

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