3. Solve the system of equations using the elimination method.
5x + 2y = 9
-5x + 4y = 3

please give detailed steps!!

Answer:

3b^2+2b-8

Step-by-step explanation:

(3b-4)(b+2)

FOIL

first:3b*b = 3b^2

outer:2*3b = 6b

inner: -4b

Last: -4*2 = -8

Add together

3b^2 +6b-4b-8

Combine like terms

3b^2+2b-8

Answer:

[tex]3b^2+2b-8[/tex]

Step-by-step explanation:

Again, we can use FOIL to expand this equation:

First: [tex]3b(b)=3b^2[/tex]

Outer: [tex]3b(2)=6b[/tex]

Inner: [tex]-4(b)=-4b[/tex]

Last: [tex]-4(2)=-8[/tex]

We can combine the b terms to get [tex]2b[/tex], and we have our answer as [tex]3b^2+2b-8[/tex]

Answer:I have the same problem

Step-by-step explanation

Answer:

strange phrasing of a question

If one assumes that the "observation" was from 3:00 pm - 5:00 pm (2 hours)

and the ball was ONLY "bounced" 10 times (3+7)

we can can say that the rate was 10 bounces/2 hours or 5 b.p.h. (bounces per hour)

Step-by-step explanation:

Answer:

There are a few rules that we can use here:

ln(a^x) = x*ln(a)

ln(a) - ln(b) = ln(a/b)

ln(1) = 0

So here we want to expand:

ln(1/49^k)

First we can use the second property to get:

ln(1/49^k) = ln(1) - ln(49^k)

using the third property, we have:

ln(1/49^k) = ln(1) - ln(49^k) = 0 - ln(49^k)

ln(1/49^k) =  - ln(49^k)

Now we can use the first property to get:

ln(1/49^k) =  - k*ln(49)

Now we can use the fact that:

49 = 7*7 = 7^2

then:

- k*ln(49) = -k*ln(7^2) = -2*k*ln(7)

So we have:

ln(1/49^k) = (-2*ln(7))*k

We can expand it anymore because this is a real number  "(-2*ln(7))" times a variable k.

Question isn't well formatted   picture if actual question is attached below :

Answer:

A' set of colleges in the United States which Don not have the word community in their name.

Step-by-step explanation:

If a universal set U is defined as :

U =set of colleges in the United States.

A = the set of colleges in the United States that have the word community in their name.

B is the set of colleges in the United States that have the name of an entertainer in their name.

The set A' is called the A complement. The complement of a particular refers to elements in the universal set which are not in A ;

A' = 1 - A'

Therefore, A' set of colleges in the United States which Don not have the word community in their name.

Answer:

it is .33

Step-by-step explanation:

take 33 and for each 0 move the decimal point like so

33.

3.3

.33

keep learning (:

9514 1404 393

Answer:

  b) 24 miles per gallon

Step-by-step explanation:

The usual metric measure of vehicle fuel efficiency is liters per 100 km. Greater efficiency is indicated by a lower value.

In the US, the measure is usually miles per gallon. Greater efficiency is indicated by a higher value. Since we want the efficiency expressed in miles per gallon, we need to divide distance by fuel consumption.

  (distance)/(fuel used) = (100 km)/(10 L)

  = (100 km)/(10 L) × (1 mi)/(1.6 km) × (3.8 L)/(1 gal) = (100×3.8)/(10×1.6) mi/gal

  = 23.75 mi/gal ≈ 24 mi/gal

Answer:

320

Step-by-step explanation:

Answer:

the answer is 320

Step-by-step explanation:

twenty is part of the ten times table and is therefore a "ten"