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2 years ago

Q. If 5 (3x-1) =40, then x = *a-3b-9

Mathematics

2 answers:

timofeeve [1]2 years ago

8 0

Answer:

a-3

Step-by-step explanation:

5(3x-1)=40

15x-5=40

15x=40+5

15x=45

x=45/15

x=3

jeyben [28]2 years ago

4 0

Answer: 3

Step-by-step explanation:

Distribute the 5: 15x-5=40

Add 5 from both sides: 15x=45

Divide 15 by both sides: 3

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What is the sum of the sequence 152,138,124, ... if there are 24 terms?

N76 [4]

Answer: -216

Step-by-step explanation:

To solve the exercise you must use the formula shown below:

$Sn=\frac{(a_1+a_n)n}{2}$

Where:

$a_1=152\\a_n=a_{24}$

You should find $a_{24}$

The formula to find it is:

$a_n=a_1+(n-1)d$

Where d is the difference between two consecutive terms.

$d=138-152=-14$

Then:

$a_{24}=152+(24-1)(14)=-170$

Substitute it into the first formula. Therefore, you obtain:

$S_{24}=\frac{(152-170)(24)}{2}=-216$

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3 years ago

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padilas [110]

.01 2/10 .21 2/9 1/4

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2 years ago

The rate at which sand is poured into a bag is modeled by the function r given by r(t)=15t−2t2, where r(t) is measured in millil

balu736 [363]

Answer:

35 mililiters

Step-by-step explanation:

Given

$r(t) = 15t - 2t^2$

Required

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The accumulated sand (r) is:

$t = r(0) + r(1) + r(2)$

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$r = 35$

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2 years ago

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Sergio039 [100]

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Step-by-step explanation:

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2 years ago

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velikii [3]

Answer: 9 girls

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3 years ago

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