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2 years ago

What is the result of multiplying the first equation by −3 and adding to the second equation?

Mathematics

1 answer:

Alla [95]2 years ago

4 0

Answer:

The answer is a _10×+8y=15

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HELP!! NUMBER PATTERNS, Rule: Add 15, subtract 10. First term: 4

Verizon [17]

It is 9 for 4+15-10.

5 0

3 years ago

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3^x+2=8^x-1 Solve for x.

zubka84 [21]

I assume the equation is supposed to be

$3^{x+2}=8^{x-1}$

Then we can write

$9\cdot3^x=\dfrac18\cdot8^x\implies\left(\dfrac38\right)^x=\dfrac1{72}$

Take the logarithm of base 3/8 on both sides:

$\log_{3/8}\left(\dfrac38\right)^x=\log_{3/8}\dfrac1{72}$

$\implies x\log_{3/8}\dfrac38=-\log_{3/8}72$

$\implies x=-\log_{3/8}72$

- - -

If the equation is actually $3^x+2=8^x-1$ , I'm afraid it cannot be solved exactly.

5 0

3 years ago

Rewrite 4 6/7 as an improper fraction.

natima [27]

Im pretty sure its 34/7

4 0

3 years ago

Please help me with this it is very complicated

kozerog [31]

Answer:

a) 35

b) 22

Step-by-step explanation:

a) The amount of numbers to the right of the vertical line is the amount of people. Count them up and you get 35.

b) The amount of numbers that are greater than 14.0 is the answer. There are 22 of those numbers.

4 0

3 years ago

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Please help!!!!!

sergeinik [125]

-8.1

Step-by-step explanation:

$\frac{ - 4}{9} x + 2.4 = 6$

Times all by 9 to get rid of fraction

$- 4x + 21.6 = 54$

Take 21.6 away from both sides

$- 4x = 32.4$

Divide by -4

$x = - 8.1$

8 0

2 years ago

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