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3 years ago

-4(2+8)=(-4xN)= Show your answers

Mathematics

2 answers:

Elanso [62]3 years ago

5 0

Answer:

n=10

Step-by-step explanation:

$- 4(2 + 8) = ( - 4 \times n) \\ \frac{ - 4(10)}{ - 4} = \frac{ - 4n}{ - 4} \\ 10 = n$

DIA [1.3K]3 years ago

5 0

Answer:

−4(2+8)=−4n

Step 1: Simplify both sides of the equation.

−40=−4n

Step 2: Flip the equation.

−4n=−40

Step 3: Divide both sides by -4.

$\frac{-4n}{4} = \frac{-40}{-4}$

n=10

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1. Investigate if there is an association between survival past 500 days and treatment group.(a) Create a variable that indicate

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There is association between survival and treatment H1: there is no association between survival and treatment.

Step-by-step explanation:

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3 years ago

How do you solve 12+5x = 18+3x

guajiro [1.7K]

Answer: x = 3

Step-by-step explanation:Simplifying

12 + 5x = 18 + 3x

Solving

12 + 5x = 18 + 3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-3x' to each side of the equation.

12 + 5x + -3x = 18 + 3x + -3x

Combine like terms: 5x + -3x = 2x

12 + 2x = 18 + 3x + -3x

Combine like terms: 3x + -3x = 0

12 + 2x = 18 + 0

12 + 2x = 18

Add '-12' to each side of the equation.

12 + -12 + 2x = 18 + -12

Combine like terms: 12 + -12 = 0

0 + 2x = 18 + -12

2x = 18 + -12

Combine like terms: 18 + -12 = 6

2x = 6

Divide each side by '2'.

x = 3

Simplifying

x = 3

6 0

3 years ago

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Put the equation y = x^2 + 26 x + 160 into the form y = ( x − h )^2 + k :

KATRIN_1 [288]

Put the equation $y = x^2 + 26 x + 160$ into the form y = ( x − h )^2 + k

Given equation is $y = x^2 + 26 x + 160$

We apply completing the square method

we take coefficient of middle term and then divide by 2 and then square it

coefficient of middle term is 26

Divide by 2, it becomes 13

then we square it (13)^2 = 169

Add and subtract 169

$y = x^2 + 26 x +169 - 169 + 160$

$y = x^2 + 26 x +169 - 9$

$y = (x + 13)^2 - 9$

We got the equation in vertex form

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3 years ago

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For the following amount at the given interest rate compounded continuously, find (a) the future value after 9 years, (b) the

Stella [2.4K]

Answer:

(a) The future value after 9 years is $7142.49.

(b) The effective rate is $r_E=4.759 \:{\%}$ .

(c) The time to reach $13,000 is 21.88 years.

Step-by-step explanation:

The definition of Continuous Compounding is

If a deposit of $P$ dollars is invested at a rate of interest $r$ compounded continuously for $t$ years, the compound amount is

$A=Pe^{rt}$

(a) From the information given

$P=4700$

$r=4.65\%=\frac{4.65}{100} =0.0465$

$t=9 \:years$

Applying the above formula we get that

$A=4700e^{0.0465\cdot 9}\\A=7142.49$

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(b) The effective rate is given by

$r_E=e^r-1$

Therefore,

$r_E=e^{0.0465}-1=0.04759\\r_E=4.759 \:{\%}$

(c) To find the time to reach $13,000, we must solve the equation

$13000=4700e^{0.0465\cdot t}$

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3 years ago

When a number is increased by 13, the result<br> is 43. What equation fits this statement?

Tanzania [10]

Answer:

Step-by-step explanation:5

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3 years ago

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