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maxonik [38]
3 years ago
11

1. Simplify. 4(2a - 1) - 4 + 7a ​

Mathematics
1 answer:
daser333 [38]3 years ago
4 0

Answer:

<em><u>=15a−8</u></em>

Step-by-step explanation:

Let's simplify step-by-step.

4(2a−1)−4+7a

Distribute:

=(4)(2a)+(4)(−1)+−4+7a

=8a+−4+−4+7a

Combine Like Terms:

=8a+−4+−4+7a

=(8a+7a)+(−4+−4)

=15a+−8

Answer:

=15a−8

hope i helped

-lvr

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find the number of terms in an AP given that its first and last terms are 13 and - 23 respectively and that its common differenc
Leokris [45]

Answer:

<u>There are 17 terms in the sequence</u>

Step-by-step explanation:

<u>Arithmetic Sequence </u>

An arithmetic sequence is a list of numbers with a definite pattern by which each term is calculated by adding or subtracting a constant number called common difference to the previous term. If n is the number of the term, then:

a_n=a_1+(n-1)r

Where an is the nth term, a1 is the first term, and r is the common difference.

In the problem at hand, we are given the first term a1=13, the last term an=-23, and the common difference r=-2 1/4. Let's solve the equation for n:

\displaystyle n=1+\frac{a_n-a_1}{r}

We need to express r as an improper or proper fraction:

\displaystyle r=-2\frac{1}{4}=-2-\frac{1}{4}=-\frac{9}{4}

Substituting:

\displaystyle n=1+\frac{-23-13}{-\frac{9}{4}}

\displaystyle n=1+\frac{-36}{-\frac{9}{4}}

\displaystyle n=1+36*\frac{4}{9}=17

n=17

There are 17 terms in the sequence

5 0
3 years ago
Mike swam 50 meters in 27.5 seconds. at that rate how long would it take mike to swim 400 meters
sp2606 [1]
It would take 110 seconds or a minute and 40 seconds. 400 divided by 50 = 4...... 27.5 multiplied by 4 equals 110; therefore, the answer is mike would swim 400 meters in 110 seconds.
8 0
3 years ago
Kevin is planting 15 bushes and 9 trees in rows if he wants all the rows the same with no plants left over what is the greatest
Korvikt [17]
Answer:

he could do 6 row of 4, 8 rows of 3, 12 rows of 2

Step-by-step explanation:
15+9=24
6*4=24
8*3=24
12*2=24
7 0
3 years ago
Pls help me pls i beg u pls help me
Rina8888 [55]

I believe the answer is b

5 0
3 years ago
Read 2 more answers
I dont understand this.​
iren2701 [21]

Answer:

88% left to consume

Step-by-step explanation:

880 of 1000

88/100

percentages are out of 100

so you can just divide both sides by 100, or take away the extra zero

let me know if you need further guidance ;)

8 0
3 years ago
Read 2 more answers
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