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3 years ago

27=6x+3(-3x+15 ????????

Mathematics

1 answer:

aalyn [17]3 years ago

3 0

combine your like terms and get x by its self

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What is the 10th term in the pattern with the formula 2n + 5?

mezya [45]

2(10)+5 = 25. The answer is A

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3 years ago

Veronica wants to check her work after evaluating -108 -(-6). What steps can she follow to verify her answer

IrinaVladis [17]

Answer:

She can use a calculator

Step-by-step explanation:

5 0

4 years ago

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Please solve this question

Alchen [17]

Answer:

(3, 4 )

Step-by-step explanation:

3x - y = 5 → (1)

x + y = 7 → (2)

adding the 2 equations term by term will eliminate y

4x + 0 = 12

4x = 12 ( divide both sides by 4 )

x = 3

substitute x = 3 into either of the 2 equations and solve for y

substituting into (2)

3 + y = 7 ( subtract 3 from both sides )

y = 4

solution is (3, 4 )

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2 years ago

What was the interest rate if your balance on an investment of $857 at the end of six years is $1268.36

Pavel [41]

Answer:

The rate of interest is 9.5092%

Step-by-step explanation:

Given as :

The investment amount = p = $857

The Amount after 6 years = A = $1268.36

The time period = t = 6 years

Let The rate of interest = r%

<u>Now, From Compound Interest method </u>

Amount = Principle × $(1+\dfrac{\textrm rate}{100})^{\textrm time}$

Or, A = p × $(1+\dfrac{\textrm r}{100})^{\textrm t}$

Or, $1268.36 = $857 × $(1+\dfrac{\textrm r}{100})^{\textrm 6}$

Or, $\dfrac{1268.36}{857}$ = $(1+\dfrac{\textrm r}{100})^{\textrm 6}$

Or, 1.48 = $(1+\dfrac{\textrm r}{100})^{\textrm 6}$

Taking power $\dfrac{1}{6}$ both side

So, $1.48^{\frac{1}{6}}$ = $((1+\dfrac{r}{100})^{6})^{\frac{1}{6}}$

Or, 10.5092 = 1 + $\dfrac{r}{100}$

Or, 10.5092 - 1 = $\dfrac{r}{100}$

Or, 9.5092 = $\dfrac{r}{100}$

∴ r % = 9.5092

So , The rate of interest = r = 9.5092 %

Hence, The rate of interest is 9.5092% Answer

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4 years ago

James is five years older than David. The sum of<br> their ages is 89. How old is David?

Dafna1 [17]

Answer:

Let David's age be x years

=> James' age = x+5 years

David + James = 89

=> x + x+5=89

=> 2x=84

=> x=84/2=42 years

David's age is 42 years

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3 years ago

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