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Luba_88 [7]
2 years ago
13

Help me guys please please

Mathematics
1 answer:
nika2105 [10]2 years ago
5 0

Shape:  the form of an object

Outline:  the line by which a figure or object is defined or bounded

Center:  Point that is equal distances from any point of the circle

Spread:  the measure of how far the numbers in a data set are away from the mean or the median

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Two numbers differ by 3. Their product<br> is 28. Find the numbers.
Paraphin [41]

Answer:

Two solutions (-4,-7) and (4,7)

Step-by-step explanation:

x = y + 3

x*y = 28

(y+3)*y=28

y^2+3y-28=0

(y+7)(y-4)=0

y=-7, y=4

x=-4, x=7

3 0
2 years ago
Twice a number plus twice a second number is 310. The difference between the numbers is 55
agasfer [191]

Answer:

x = 105

y = 50

Step-by-step explanation:

To solve this, try writing it out as an equation/expression first.

When you do, you should get something like this:

2x + 2y = 310

x - y = 55

This is a system of equations. To solve this, we're going to multiply the second equation [x - y = 55] by 2.

2(x - y = 55) = 2x - 2y = 110

Now, subtract your new equation from the first one [2x + 2y = 310]

2x + 2y = 310

-2x + 2y = -110

//<em>If you</em>'<em>re wondering why I changed the signs of the new equation, I multiplied our new equation [2x - 2y = 110] by -1 since we're subtracting//</em>

When you're done subtracting, the "2x" and "-2x" cancel out, so you're left with:

4y = 200

Now, simply solve for "y" by dividing both sides by 4.

4y = 200

y = 50

Now that we know y's value, substitute it into one of our original equations to solve for x.

//<em>I'm gonna plug y into the second equation [x - y = 55] just because it's easier, but you can plug it into the first one as well and get the same answer//</em>

When we plug it in, we get:

x - (50) = 55

To solve for "x," we must get rid of "-50." To do this, add 50 to both sides.

x - 50 = 55

x = 105

<u>So, x = 105 and y = 50</u>

4 0
3 years ago
I took a picture of my math questions, here take a look.
PtichkaEL [24]
Which one do you want to be awnserd

7 0
2 years ago
If y is 20, what is x?
vesna_86 [32]

When y=20 , x is −5.

8 0
3 years ago
Read 2 more answers
6(1 − 3d) &lt; 2(7d + 6
vagabundo [1.1K]

Answer:

d> -3/16

Step-by-step explanation:

8 0
2 years ago
Read 2 more answers
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