All categories

3 years ago

7 times the sum of a number and 4 is the same as 8 decreased by 3 times the number. Find the number

Mathematics

2 answers:

Marrrta [24]3 years ago

4 0

Answer:

7(x4) = 8-x

Step-by-step explanation:

daser333 [38]3 years ago

3 0

Answer:

x= -2

Step-by-step explanation:

7(4+x)=8-3x would be your equation

your first step would be to move your 3x to the other side of the equation by adding 3x to both sides after this your equation should look as follows: 7(4+x)+3x=8 2nd: you should distribute your 7 to the numbers inside of the parenthsis and combine like terms to get 10x+28=8 then you move your 28 to the other side by subracting 28 and you will get 10x=-20 divide by ten to get the answer which is x=-2

You might be interested in

Twenty-four is 30% of what number?

IgorLugansk [536]

24 / 30 x 100 = 80

answer: <span>Twenty-four is 30% of 80</span>

7 0

3 years ago

Read 2 more answers

I don’t know the equation :(

Serhud [2]

Answer:

me too

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

The claim is that the proportion of adults who smoked a cigarette in the past week is less than 0.30, and the sample statistics

IrinaK [193]

Answer: 0.84

Step-by-step explanation:

let p be the population proportion of adults who smoked a cigarette in the past week.

As per given , we have

$H_a: p$

Sample size : n= 1491

The sample proportion of adults smoked a cigarette= $\hat{p}=\dfrac{x}{n}=\dfrac{462}{1491}=0.30985915493\approx0.31$

The test statistic for proportion is given by :-

$z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

Substitute all the values , we get

$z=\dfrac{0.31-0.30}{\sqrt{\dfrac{0.30(1-0.30)}{1491}}}\\\\=\dfrac{0.01}{\sqrt{0.000141}}\\\\=\dfrac{0.01}{0.011874342087}=0.84261497731\approx0.84$

Hence, the value of the test statistic = 0.84

6 0

3 years ago

Lisa paid $43.95 for 16.1 gallons of gasoline. What was the cost per gallon, rounded to the nearest hundredth?

alina1380 [7]

I agree i believe it is 2.37 per gallon

8 0

3 years ago

Read 2 more answers

Please help me with this

rusak2 [61]

Answer: It would be the second answer that says SSS.

Step-by-step explanation: Side MK and MN are congruen. Side JN and JK are also congruen. Since both triangles share the line MJ, it’s congruent based on the reflexive property.

4 0

3 years ago