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3 years ago

I only need one solved I just need to understand how to do it ASAP. Please help me

Mathematics

1 answer:

KengaRu [80]3 years ago

7 0

Answer:

#19= -11, #20=4, #21=2, #22= 2, #23= 1/3, #24= -3/5, #25= 1/2

Step-by-step explanation:

#19= 1-3x^2 What you do first is that you do 2^2 to get 4, than multiply i by 3 to get 12, than you subtract 12 from 1( 2^2=4, 4*3, 1-12= -11)

#20=2-3x+x^2 what you do is sub in #, 2-3(-1)+(-1)^2, 2+3-1= (2+3)-1, 5-1=4

#21=x-3x^2 What you do is sub #, -1-3(-1)^2=-1+3=2

#22=x+x^2 sub #, 1+1=2

#23= 1/x+1, sub #, to get 1/2+1 =1/3

#24=x/2-x, sub #, to get -3/ 2+3= -3/5

#25=1/squarert of x, sqrt of 4 is 2, 1/2

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3 years ago

Under a dilation, are the pre-image and the image always,<br> sometimes, or never congruent?

DerKrebs [107]

Answer:

Never congruent

Step-by-step explanation:

A dilation is a transformation that makes an image that is thr same shape as the original, but a DIFFERENT SIZE.

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3 years ago

Gretchen has eight socks, two of each color: magenta, cyan, black, and white. she randomly draws four socks. what is the probabi

Svetllana [295]

Begin by computing the number of all the possibilities:
It is given by the following formula: $C_8^4=\frac{8!}{4!(8-4)!}= \frac{8\times7\times6\times5}{4\times3\times2}=70$
Computing the number of favorable cases:
Exactly one pair of socks with the same color means either one magenta pair,
or one cyan pair, or one black pair or one white pair:
Number of possibilities with one magenta pair means"a magenta pair plus two socks with different colors from three possibilities" means 3 possibilities.
Same computation for the other colors.
Adding we get: $3+3+3+3=12\text{ possibilities }$
By definition, the probability of an event is the number of favorable cases over the number of possible cases:
$\frac{12}{70}= \frac{6}{35}$

The probability is $\frac{6}{35}$

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4 years ago

Ericka and her two sisters divided 915 stickers equally. About how many stickers did each girl receive?

Musya8 [376]

It should be 35, if that is an answer choice.

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4 years ago

Pls help i don’t understand

BartSMP [9]

Answer:

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Step-by-step explanation:

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4 years ago

I only need one solved I just need to understand how to do it ASAP. Please help me​

I only need one solved I just need to understand how to do it ASAP. Please help me