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andrezito [222]
3 years ago
13

Please help me with expansion and factorization of quadratic expressions. a) -4x^2 + 2x^2

Mathematics
1 answer:
Flura [38]3 years ago
8 0

Answer:-2x^2(2-1)

Step-by-step explanation:

-4x^2 + 2x^2=-2x^2(2 - 1)

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Mashcka [7]
-6x is the correct answer
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In a grocery store a $21 case of toilet paper is labeled, "Get a 20% discount." What is the discount? What is the sale price of
arsen [322]

Hi There!

Step-by-step explanation and Answer:

21 * 0.2 = $4.2 (Discount)

21 - 4.2 = $16.8 (Sale Price)

Hope This Helps :)

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Cherries are on sale for $16 for 4 pounds. Jordyn pays $88.00 for cherries to make a cobbler. How many pounds of cherries doses
Tamiku [17]
She bought 5.5 pounds of cherries


explanation-
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7 0
2 years ago
Helppppp plzzzz ASAP!!!!!!<br> Thank you!!!!!!
Zielflug [23.3K]

Answer:

option 4.

16 square units

Step-by-step explanation:

as we do not have the measures of the sides, but if the points of the vertices with Pythagoras we can calculate the sides.

P = (2 , 4)

S = (4 , 2)

we have to subtract the values ​​of p from s

PS = (4 - 2  , 2 - 4)

PS = (2 , -2)

by pitagoras h ^ 2 = c1 ^ 2 + c2 ^ 2

h: hypotenuse

c1: leg 1

c2: leg 2

PS^2 = 2^2 + -2^2

PS = √ 4 + 4

PS = √8

PS = 2√2

S = (4 , 2)

R = (8 , 6)

SR = (8-4  ,  6-2)

SR = (4 , 4)

by pitagoras h ^ 2 = c1 ^ 2 + c2 ^ 2

h: hypotenuse

c1: leg 1

c2: leg 2

SR^2 = 4^2 + 4^2

SR = √ (16 + 16)

SR = √32

SR = 4√2

having the values ​​of 2 of its sides we multiply them and obtain their area

PS * RS = Area

2√2 * 4√2 =

16

3 0
3 years ago
The expression to find the perimeter of a rectangle is 2(length + width). What is the perimeter, in units, of a rectangle of len
stiks02 [169]
That is  2(1/7 + 1/2)

 = 2( 2/14 + 7/14)

= 2 * 9/14

= 18/14   = 9/7 units (  or  1 2/7 units)
8 0
3 years ago
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