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Zigmanuir [339]
3 years ago
13

The expression -3m - [2m + (5 - m)] + 7 was simplified as 2 - 4m. Without simplifying, explain how you can show that it has been

simplified correctly.
Mathematics
2 answers:
Nezavi [6.7K]3 years ago
6 0
You can combine like terms. For this problem, you would combine the m's and the regular numbers. 
Romashka-Z-Leto [24]3 years ago
3 0

Answer:

Solve the like terms separately

Step-by-step explanation:

Solve the like terms separately

So, first solve m terms

-3m - 2m + m = -4m

The sign inside the square bracket changes as there is a preceding negative sign. The (5-m) bracket does not matter as you can write the expression as

-3m - [2m + 5 - m] + 7

Then we solve the non m terms

-5 + 7 = 2

So, the expression

-3m - [2m + (5 - m)] + 7 = 2 - 4m

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Which ordered pair is a solution of the equation y-3=5(x-2)
notsponge [240]

Answer:

Three of the pair order I found is (0, -7), (1, -2), (2, 3)

Choose values for <em>x </em>values and substitute in to find the corresponding <em>y </em>values.

8 0
3 years ago
Mileage tests are conducted for a particular model of automobile. If a 98% confidence interval with a margin of error of 1 mile
kipiarov [429]

Answer: 37

Step-by-step explanation:

As per given description in the question, we have

Population standard deviation : \sigma=2.6\text{ miles per gallon}

Critical value for 98% confidence interval = z_{\alpha/2}=2.33

Margin of error : E= 1 mile per gallon

Formula we use to find the sample size :

n=(\dfrac{z_{\alpha/2}\cdot \sigma}{E})^2

i.e. n=(\dfrac{(2.33)\cdot(2.6)}{1})^2

\Rightarrow\ n=36.699364\approx37

Therefore , the number of automobiles should be used in the test =37

4 0
3 years ago
There are 7 tigers in a castle,each tiger has 7 children,each child has 7 tiger friends,then how many tigers are there in the ca
Ksenya-84 [330]
There are 7 parent tigers
Parents = 7


7 tigers each have 7 children. That means there's total of 7 × 7 children.
Children = 7 × 7 = 49

Each child has 7 friends. That means there's total of 49 × 7 friends.
Friends = 49 × 7 = 343

Total = 7 + 49 +343 = 399 TIGERS
I'm not a tiger so I'm not counting myself.

3 0
4 years ago
FIND THE SLOPE OF THE LINE...<br><br> A) 1/2<br><br> B) 2<br><br> C) - 1/2<br><br> D) -2
Ainat [17]

Answer:

The slope would be C) -1/2

Step-by-step explanation:

To find it, we need to use the slope formula and two points on the line. The points we'll use are (0, -3) and (2, -4)

m(slope) = (y2 - y1)/(x2 - x1)

m = (-3 - -4)/(0 - 2)

m = 1/-2

m = -1/2

8 0
3 years ago
NEED HELP URGENTLY!!!
morpeh [17]

Answer:

2,9

Step-by-step explanation:

find difference between 16 and 9, and then subtract it by 9. find difference between3 and 6 then add that to 6.

5 0
4 years ago
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