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vovikov84 [41]
3 years ago
15

-4x(2x^2-y) multiplying polynomials

Mathematics
1 answer:
andrezito [222]3 years ago
6 0

Answer:

-8x^3+4xy

Step-by-step explanation:

-4x·2x^2

Multiply the like terms

-8x^3

Two negatives equal a positive so

-4x(-y)

=+4xy

Therefor the answer is:

-8x^3+4xy

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Does second-hand smoke increase the risk of a low birthweight? A baby is considered have low birthweight if he/she weighs less t
marishachu [46]

Answer:

Option 2) Null hypothesis: p = 0.078 , Alternate hypothesis: p > 0.078

Step-by-step explanation:

We are given the following in the question:

According to the National Center of Health Statistics, about 7.8% of all babies born in the U.S. are categorized as low birth weight.

Sample size, n = 1200

p = 7.8% = 0.078

We have to carry a hypothesis test whether national percentage is higher than 7.8% or not.

Thus, we can design the null and the alternate hypothesis

H_{0}: p = 0.078\H_A: p > 0.078

Thus, the correct answer is:

Option 2) Null hypothesis: p = 0.078 , Alternate hypothesis: p > 0.078

5 0
3 years ago
If you flip three fair coins what is the probability that the two first flips will both be heads, and the third flip will be eit
Brrunno [24]

Answer:

The probability that a coin flip is a head or a tail is 0.5. The probability that a coin flip is either a head or a tail is 1. The probability that a three-coin-flip is two heads and a head or a tail is 0.25.

Step-by-step explanation:

5 0
3 years ago
Jeremy buy a new computer with 14 optional features some of the features cost $28.50 and some cost $110.99 he if he spent a tota
makkiz [27]

28.50x + 110.99(14-x)=811.45

distribute

28.50 x + 1553.86-110.99x =811.45

combine like terms

-82.49x+1553.86=811.45

subtract 1553.86 from each side

-82.49x =-742.41

divide by -82.49

x=9

He bought 9 of the 28.50 features and 5 of the 110.99 features

4 0
3 years ago
Evaluate the expression when d = 20 and v = 19 20v + 12d - 6v
Alexeev081 [22]
D = 20 , v = 19
20v + 12d - 6v
= 20 (19) + 12 (20) - 6 (19)
= 380 + 240 - 114
= 620 - 114
= 506
When d = 20 and v = 19
20v + 12d - 6v = 506
6 0
2 years ago
Read 2 more answers
Which expression is equilavent to -4y -x - 3y - 9x
HACTEHA [7]

Answer:

tfbgf

Step-by-step explanation:

8 0
3 years ago
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