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2 years ago

-2(3x-5)=4(x+3)+8 Please will give brainlyest

Mathematics

1 answer:

irina [24]2 years ago

6 0

Answer:

x=-1

Step-by-step explanation:

-2(3x-5)=4(x+3)+8

-6x+10=4(x+3)+8

-6x+10=4x+12+8

-6x+10=4x+20

-6x+10-10=4x+20-10

-6x=4x+10

-6x-4x+10-4x

-10x=10

$\frac{-10}{-10}= \frac{10}{-10}$

x=-1

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Write a rule for the following functions. I need help fast!

marishachu [46]

Answer:

20. y = 3·3^x

21. y = (1/3)^x

Step-by-step explanation:

These exponential functions can be written in the form ...

y = a·b^x

where a is the value of y when x=0, and b is the common ratio between terms that have x different by 1.

20. The ratio is 9/3 = 3; the multiplier is 3 (the value of y when x=0), so the function is ...

y = 3·3^x

21. The ratio is (1/3)/1 = 1/3; the multiplier is 1, so the function is ...

y = (1/3)^x

_____

<em>Alternate solution</em>

Each of these can be written in a more compact form:

20: y = 3^(x+1)

21: y = 3^(-x)

5 0

3 years ago

What is the answer to 1/5(5x-15)-2x

Contact [7]

Answer:

-1x - 3 or -x - 3

Step-by-step explanation:

1/5 (5x - 15) - 2x =

1x - 3 - 2x =

1x - 2x - 3 =

-1x - 3

5 0

3 years ago

Read 2 more answers

An article measured speeds of vehicles on several roads in the state of Kansas. On South Cedar Niles, 73 vehicles were observed,

kifflom [539]

Answer:

The sample supports the hypothesis that more than half of the vehicles in South Cedar Niles exceed the speed limit.

p-value = 0.00092

Step-by-step explanation:

To solve this problem, we run a hypothesis test about the population proportion.

Proportion in the null hypothesis $\pi_0 = 0.5$

Sample size (n) = 73

Sample proportion (p) = 49/73 = 0.6712

H0: $\pi_0 = 0.5$

Ha: $\pi_0 \geq 0.5$

Test statistic = $(p - pi)\sqrt{n} / \sqrt{\pi_0 (1-\pi_0)}$

Calculated statistic = $(0.6712 - 0.5)\sqrt{73} / \sqrt {0.5(1-0.5)} = 2.9255$

p-value = 0.00092

Since, p - value is less than or equal to 0.05, the null hypothesis must be rejected. The sample supports the hypothesis that more than half of the vehicles in South Cedar Niles exceed the speed limit.

5 0

3 years ago

A solid has cross sections that are squares. The side lengths of the square cross sections are equal to x^2, where 0≤x≤1. Suppos

Pavlova-9 [17]

Answer:

A) D- 0.330

B) D- 0.333

Step-by-step explanation:

Part A

0.2 × (0.1² + 0.3² + 0.5² + 0.7² + 0.9²)

= 0.330

B) integrate x²

x³/3

Limits 0 to 1

1/3 - 0

1/3

0.333

4 0

4 years ago

What is the range of the function represented by these ordered pairs?

JulijaS [17]

Answer:

Step-by-step explanation:

The range of a data set is the y-coordinates of the ordered pairs.

So, we have the ordered pairs:

{(-2,1), (0,0), (3,-1), (-1,7), (5,7)}

So, the range will be (the bolded numbers):

{(-2,1), (0,0), (3,-1), (-1,7), (5,7)}

Thus, our answer is:

{-1, 0, 1, 7}

Note that the range should be in ascending order.

Also note that even though 7 appears twice, 7 is 7, so we only put one 7.

The answer is B.

8 0

3 years ago