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saveliy_v [14]
3 years ago
8

(2x2 + 2x + 3) – (x2 + 2x + 1)

Mathematics
2 answers:
Soloha48 [4]3 years ago
6 0

8x+4 is the answer to your problem
hope this helps
Alja [10]3 years ago
6 0
Simplify for each term
2x^2+2x+3+(-x^2-2x-1)
Simplify by adding terms
x^2+2

Your answer is: x^2+2
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For every 13 birds born at the zoo there are two animals born. There were 44 if you were animals born last month then birds so h
Daniel [21]
The ratio birds : animals = 13 : 2
so for every 1 animal, 6.5 birds were born

last month: animals = birds - 44
birds - animals = 44
use trial and improvement to find:
if there were 52 birds, there must be 8 animals
CHECK: 52 - 8 = 44
4 0
3 years ago
This morning, Jake took a history test. There were 90 multiple-choice problems on the test and
ahrayia [7]

Answer:

36

Step-by-step explanation:

To find percent, turn the percent into a fraction (turn 40% into .40) then multiply it by the total number (90).

5 0
3 years ago
There is a bag with only red marbles and blue marbles.
natulia [17]

Answer:

There must be 35 red marbles.

Step-by-step explanation:

This question can be solved using a rule of three.

A probability is the number of desired outcomes divided by the number of total outcomes.

The probability of randomly choosing a red marble is 7/9.

This means that for each set of 9 marbles, 7 must be red.

There are 45 marbles in total in the bag and each is equally likely to be chosen. Work out how many red marbles there must be.

How many red marbles out of 45?

7 red - 9 marbles

x red - 45 marbles

9x = 45*7

Simplifying by 9

x = 5*7

x = 35

There must be 35 red marbles.

6 0
3 years ago
I need the area and perimiter.
Montano1993 [528]

Answer:

189.3 square inches, 55.7 inches

Step-by-step explanation:

Area = area of rectangle + area of semicircle

area of rectange = 10 * 15 = 150 square inches

radius of semicircle = 10/2 = 5

area of circle = (pi * 5^2)/2 = 12.5pi square inches

total area = 150 + 12.5pi = 189.3 square inches

total perimeter = perimeter of rectangle - left side + perimeter of semicircle

perimeter of rectangle = 10 + 15 + 15 = 40 inches

perimeter of semicircle = 10pi/2 = 5pi inches

total perimeter = 40 + 5pi = 55.7 inches

3 0
3 years ago
In the xy-plane, the point (6,3) is the midpoint of the line segment with endpoints (x,5) and (9,y). What is the value of x+y?
sasho [114]
The formula for the midpoint of a line is 
x1 + x2            y1 + y2
---------   ,        -----------
     2                     2

so x+9 / 2 = 6  and     5+y / 2 = 3

so x = 3 and y =  1

x+y = 4
5 0
3 years ago
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