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Schach [20]
4 years ago
10

Find the value of x in the equation 2(x – 3) + 5x = 5(2x + 6).

Mathematics
2 answers:
NISA [10]4 years ago
6 0

D is the answer.

First distribute the numbers and combine like terms.

7x - 6 = 10x + 30

Then subtract 7x from both sides.

-6 = 3x + 30

Subtract 30 on both sides.

-36 = 3x

Then divide by 3 on both sides

-12 = x

Hope this helps!
bija089 [108]4 years ago
4 0
The answer is D.-12 hope this helps.
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3) A local school district has 4512 students this year. The student population is declining by 2.5% per year. How many students
il63 [147K]

Answer:

Number of students(n1)= 4,402

Step-by-step explanation:

Giving the following information:

Number of students= 4,512

Declining rate= 2.5%

<u>To calculate the number of students next year, we need to use the following formula:</u>

Number of students (n+x)= number of students (n0) / [(1+declining rate)^(n+x)

x= number of years

Number of students(n1)= 4,512/1.025

Number of students(n1)= 4,402

5 0
3 years ago
What two numbers multiply to be 12 and add to be -11?
Rus_ich [418]

Answer:

-12 and 1

Step-by-step explanation:

If you multiply 12 by 1 you get 12, hence if you add -12 and 1 now you will get -11

6 0
4 years ago
140 fluid ounces increased by 45%
Leokris [45]
First divided 140 by 100 to find out how much 1 percent is
140 ÷ 100 = 1.4

multiply 1.4 by 45 to find 45 %; 1.4 x 45 = 63

then add 63, which is 45%, to 140, which is 100%, and you get 203, which is 140 + 45%, or 145%

please mark brainliest if this helped you. I hope it did!

4 0
4 years ago
If ln(4x+y)=2x-3,then dy/dx=
Viktor [21]

\ln(4x+y)=2x-3

Differentiate both sides wrt x:

\dfrac{\mathrm d(\ln(4x+y))}{\mathrm dx}=\dfrac{\mathrm d(2x-3)}{\mathrm dx}

By the chain rule, we get

\dfrac1{4x+y}\dfrac{\mathrm d(4x+y)}{\mathrm dx}=2

\dfrac{4+\frac{\mathrm dy}{\mathrm dx}}{4x+y}=2

Solve for \frac{\mathrm dy}{\mathrm dx}:

4+\dfrac{\mathrm dy}{\mathrm dx}=8x+2y

\boxed{\dfrac{\mathrm dy}{\mathrm dx}=8x+2y-4}

4 0
3 years ago
J'ai un exercice de maths pour demain merci de commenter au plus vite
kari74 [83]
Oui je peux the aider
8 0
3 years ago
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