Mathematics, 31.01.2020 16:56 taheraitaldezign

Can someone me solve a-d? i have answers in the back of the book, but i can't figure out how they (they being the author of the textbook) got their answer. i'm really confused. ?

Can someone me solve a-d? i have answers in the back of the book, but i can't figure out how they

Answers: 3

Show answers

Answers

Answer from: lukeritsema88

Alright. So for:
a) 4(x+7)+3(x+5) Here we need to distribute the number outside of the parenthesis to the terms inside. So after distributing, we get 4x+28+3x+15. Then simplify this equation to 7x+43.
b) 3(2a+4b)+9(3a-2b) Same here. We distribute the number outside of the parenthesis to the terms inside. After distributing, we get 6a+12b+27a-18b. Then simplify to get 33a-6b.
c) 2(3u-5)-3(2u+1) As expected, same here. We distribute the number outside of the parenthesis. But here, we have a negative. Remember to distribute that as well. So we get 6u-10-6u-3. Then we simplify and get -13.
d) b(-5v-4)-2b(v+4) -_- Getting a bit boring... We distribute the variable from outside the parenthesis into the terms in the parenthesis. We get -5bv-4b-2bv-8b. Then simplify to get -3bv-12b.

**If you don't understand distributing, just let me know!

Answer from: tierann46

(A) 4(x+7)+3(x+5)
4x+28+3x+15 **combine like terms**
7x+43

(B) 3(2a+4b)+9(3a-2b)
6a+12b+18a-18b **combine like terms**
24a-6b

(C) 2(3u-5)-3(2u+1)
6u-10-6u-3 **combine like terms**
-13 *6u cancels out

(D) b(-5v-4)-2b(v+4)
-5bv-4b-2bv-8b **combine like terms**
-7bv-12b

Answer from: Quest

the answer is 200

step-by-step explanation:

this is a problem about poisson probabilities. i don't know if you've

already studied poisson distributions, or if you have a place to look

to read more about the subject.

here's how you can see a poisson distribution coming. when there are

a lot of events that may happen at any time (or any place), and when

you're counting how many of them happen at a particular time (or a

particular place), and each event is independent of the others, then

the result is a poisson distribution. this is roughly true for the

chocolate chips; one chip being in a cookie has only a small effect on

the probability that another chip will be in the cookie.

once you know you have a poisson distribution, you know a lot. there

is only one parameter to a poisson distribution, so if you know the

mean, you know everything. the form of the distribution is

probability of n chips = {[e^(-x)]*(x^n)} / (n! )

Answer from: Quest

2/3

step-by-step explanation:

the slope of a line is equal to the rise/run. in this case the line rises 2 units for every +3 units it moves

What is the slope of a line that is parallel to the line shown? taking quiz need

Another question on Mathematics

Mathematics, 20.06.2019 18:04

You serve 3 1/4 gallons of punch at a party. your friends drink 1 1 /2 gallons of the punch. which of these containers is the smallest you can use to store the remaining punch?

Answers: 3

Answer

Mathematics, 21.06.2019 16:30

Factor the monomial completely 42a3b3

Answers: 3

Answer

Mathematics, 21.06.2019 18:00

Simplify the expression. -2/5(10+15m-20n)

Answers: 1

Answer

Mathematics, 21.06.2019 23:30

Scenario: a rectangular plot of ground is 5 meters longer than it is wide. its area is 20,000 square meters. question: what equation will you find the dimensions? note: let w represent the width. options: w(w+5)=20,000 w^2=20,000+5 (w(w+5))/2=20,000 w+2(w+5)=20,000

Answers: 1

Answer

You know the right answer?

Can someone me solve a-d? i have answers in the back of the book, but i can't figure out how they...

Questions

Mathematics, 16.04.2020 07:00

Which function represents g(x), a reflection of f(x) = 45 across the x-axis? g(x) = -4(2)* g(x) = 4(2)- g(x) = -4/3) g(x...