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3 years ago

3x(x−2), when x=7

Mathematics

2 answers:

gtnhenbr [62]3 years ago

7 0

Answer:

105

Step-by-step explanation:

subbing x for 7:

3*7(7-2)=21*5=105

raketka [301]3 years ago

3 0

105 right? because 3(7)((7)-2) 21(5) =105

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Find all solutions by factoring. c? + 13c + 40 = 0

Karolina [17]

Answer: c = -5, -8

Step-by-step explanation:

c^2 +13c+40=0

(c+5)(c+8)=40

c = -5, -8

3 0

3 years ago

Solve. 27^x+2=81 Algebra 2

Pepsi [2]

Answer:

x = -2/3

Step-by-step explanation:

27 ^(x+2) = 81

Rewrite 27 as a power of 3

27 = 3^3

Rewrite 81 as a power of 3

3^4

3^3^(x+2) = 3^4

We know that a^b^c = a^(b*c)

3^3*(x+2) = 3^4

3^(3x+6) = 3^4

The bases are the same so the exponents are the same

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Subtract

6 from each side

3x+6-6 =4-6

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7 0

3 years ago

Read 2 more answers

Can anybody help me with this?

AnnZ [28]

Answer:

it will take 8 weeks for the bacteria to reach 16,000

Step-by-step explanation:

week 1: 125

week 2: 250

week 3: 500

week 4: 1000

week 5: 2000

week 6: 4000

week 7: 8000

week 8: 16000

hope this helps :)

4 0

4 years ago

Someone please help with trig question ASAP!!!! You dont need to do both! Will mark brainliest if right

Zanzabum

Answer:

8 x = 60.10251159

9 x = 3.66062978

Step-by-step explanation:

Hey There!

So to answer these questions we need to use the Law of sines

Consider the following image

So to find x in number 8 we setup an equation

$\frac{x}{sin90} =\frac{48}{sin53}$

now we solve for x

step 1 multiply each side by sin 90

now we have

$x = \frac{48sin90}{sin53}$

if you plug the equation in a calculator you get that

x=60.10251159

( make sure if it says to round to the nearest.... that you round before entering your answer)

For number 9 the equation would be

$\frac{9}{sin90} =\frac{x}{sin24}$

now we solve for x

step 1 multiply each side by sin 24

now we have

$x=\frac{9sin24}{sin90}$

if you plug this into a calculator you get that

x = 3.66062978

(once again if it says to round to the nearest... make sure you round before you put in your answer.)

3 0

3 years ago

The lengths of the sides of triangle XYZ are written in terms of the variable m, where m ≥ 6.

natulia [17]

Answer:

Option (2)

Step-by-step explanation:

The angle opposite the shortest side is the smallest and the angle opposite the longest side is the largest.

Since m is greater than or equal to 6, we know that:

2m+3 > m+8 > m-3

7 0

2 years ago