MATHEMATICS MIDDLE SCHOOL

Which is a solution to the equation 3x2 + 2x − 20 = 2x2 + 15?

Answers

Answer 1
Answer:

Answer: 33/2

Step-by-step explanation:

3x2+2x-20=2x2+15

6+2x-20=4+15

2x-14=19

2x=19+14

2x=33

x=33/2

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Is 3/4 bigger than 7/8

Answers

3/4 us equivalent to 6/8, which is less than 7/8.
no because 3/4 is 75% and 7/8 is 87.5 @ which makes 7/8 bigger

HELP PLZ

What is the shape of the following cross section????

Answers

The shape of the triangle is the cross-section part of the given figure. Thus, option A is correct.

How to find the shape inscribed in a square?

The cross-section part of the given figure could be the shape fro the inscribed figure.

Here we can see that the three-dimensional figure inscribed in the square is a cone.

The right circular cone is the cone in which the line joining peak of the cone to the center of the base of the circle is perpendicular to the surface of its base.

But for the plane of the square, the triangle is the cross-section part of the given figure.

Learn more about shape here;

brainly.com/question/10643323

#SPJ2

Answer:

Triangle

Step-by-step explanation:

Look at the shape of the red part

If Julie needs 3 1/4 cups of oat meal how many 1/4 cups of oatmeal will she use ?

Answers

Basically, you divide 3 1/4 by 1/4. To do that, you have to change the mixed number into an improper fraction. 3 1/4 as an improper fraction is 13/4. I was able to find that since you simply just multiply the denominator by the whole number, 4 x 3, which is 12, then add 12 to the numerator, 1, which is 13. Finally, the improper fraction is 13/4 (the denominator stays the same). Now, we can divide the fractions. One rule about fractions: dividing them is the same as multiplying them with the reciprocal of the other. Like say for example, the reciprocal of 1/5 is 5/1. 

Let's solve:

13/4 divided by 1/4 =
13/4 x 4/1 = At this point, you just multiply them straight across.
52/4 = It's not simplified since both can still be divided. So, you simplify by finding the greatest common multiple of 52 and 4, which is 4. 52 divided by 4 = 13; 4 divided by 4 = 1. 
52/4 = 13/1 = 13 (any numerator with the denominator of one is a whole number when simplified)

So if Julie needs 3 1/4 cups of oatmeal, she will use 13 of 1/4 cups of oatmeal. Answer's 13. :) I really hope I helped!

Melissa plans to purchase a pair of jeans for $39.95. She wants to bring enough money to pay for the jeans plus the sales tax, which is 8.25%. What is her total, including sales tax?

Answers

You have to calculate the 8.25% of $39.95, then add the numbers together. 
So: 8.25% of 39.95 = 3.3 (approximately)
The total is 39.95 + 3.3 = 43.25

Another method is to simply calculate the 108.25% of 39.95, you can get this by multiplying 39.95 with 1.0825.

Find the value of m ÷ n if m = 1 1/4 and n = 3

Answers

m ÷ n
m = (11)/(4)
n = 3

(11)/(4) ÷ 3
Multiply (11)/(4) by the reciprocal of 3 which is (1)/(3)

=(11)/(4) × (1)/(3)
=(11*1)/(4*3)
=(11)/(12)

I have gone mind blank. How do you find area and perimeter? For squares, triangles, and polygons.

Answers

Area:
Square- Multiply 2 sides together
Triangle- Multiply base by the height and divide by 2
Polyon- (I forgot how to find this sorry)

Perimeter:
Square- Add all 4 sides
Triangle-Add all 3 side (a+b+c)
Polygon- Add all the sides
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