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ankoles [38]
3 years ago
9

Which is a correct first step for solving this equation? X+7=2x+5-4x

Mathematics
2 answers:
shepuryov [24]3 years ago
8 0

Step-by-step explanation:

you collect like terms from both sides that is, the variables on one side and the constants on the other side

Vika [28.1K]3 years ago
5 0

Answer:

The first step will be grouping the like terms together on both sides of '='

Step-by-step explanation:

The given equation is :

x+7=2x+5-4x

The first step will be grouping the like terms together on both sides of '='

x-2x+4x=5-7

Now adding both sides.

3x=-2

Dividing both sides by 3, we get

x=\frac{-2}{3}

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An automobile manufacturer has given its car a 46.7 miles/gallon (MPG) rating. An independent testing firm has been contracted t
erastova [34]

Answer:

z=\frac{46.5-46.7}{\frac{1.1}{\sqrt{150}}}=-2.23    

The p value would be given by:

p_v =2*P(z  

For this case since th p value is lower than the significance level of0.05 we have enough evidence to reject the null hypothesis and we can conclude that the true mean for this case is significantly different from 46.7 MPG

Step-by-step explanation:

Information given

\bar X=46.5 represent the mean

\sigma=1.1 represent the population standard deviation

n=150 sample size  

\mu_o =46.7 represent the value to verify

\alpha=0.05 represent the significance level for the hypothesis test.  

z would represent the statistic

p_v represent the p value

Hypothesis to test

We want to test if the true mean for this case is 46.7, the system of hypothesis would be:  

Null hypothesis:\mu = 46.7  

Alternative hypothesis:\mu \neq 46.7  

Since we know the population deviation the statistic is given by:

z=\frac{\bar X-\mu_o}{\frac{\sigma}{\sqrt{n}}}  (1)  

Replacing we got:

z=\frac{46.5-46.7}{\frac{1.1}{\sqrt{150}}}=-2.23    

The p value would be given by:

p_v =2*P(z  

For this case since th p value is lower than the significance level of0.05 we have enough evidence to reject the null hypothesis and we can conclude that the true mean for this case is significantly different from 46.7 MPG

7 0
2 years ago
How i did? In livada sunt 12 mere am cules 6. Cate mera au ramas?
vovikov84 [41]

Answer:

72

Step-by-step explanation:

12x6=72

7 0
2 years ago
A box of cereal weighs 0.48 kilograms. What is the weight in pounds to the nearest hundredth of the cereal box
bagirrra123 [75]

Answer:

1.06

I hope this helps :D

5 0
2 years ago
Please someone help me please??!!​
algol [13]

Answer:

4

Step-by-step explanation:

it's just another way of saying find the slope

7 0
2 years ago
Read 2 more answers
4 / 500 in scientific notation would be?
Lubov Fominskaja [6]
4/500=0.008

scientific notation form = 8 x 10^9
3 0
3 years ago
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