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4 years ago

Solve the equation for x -3x+7=-2

Mathematics

2 answers:

timurjin [86]4 years ago

7 0

Answer:

x=3

Step-by-step explanation:

Subtract 7 from both sides and the equation becomes

-3x=-2-7

Simplify

-3x=-9

Divide both sides by -3

x=3

Hitman42 [59]4 years ago

3 0

Answer:

x=-2 1/2

Step-by-step explanation:

x-3x=-2+7

x-3x=5

-2x=5

x=5/(-2)

x=-2 1/2

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A square has a diagonal that is 36 mm long. What is the area of the square?

kkurt [141]

Answer:

18mm

Step-by-step explanation:

in the triangle we will say:

36=x^2 +x^2

36=2x^2

so x will be = root 18

as the area = x*x

so root 18 * root18=18mm^2

7 0

3 years ago

If 0.46 meter is cut from a 12 meter steel rod, how long is the steel rod after the cut?

VARVARA [1.3K]

The answer is 11.54 because 12.00 -00.46 is 11.54

4 0

4 years ago

Read 2 more answers

Elwin Osbourne, CIO at GFS, Inc., is studying employee use of GFS e-mail for non-business communications. A random sample of 200

ladessa [460]

Answer:

The 90% confidence interval for the population proportion is

(0.10872, 0.19128)

Step-by-step explanation:

Explanation:-

Step(i):-

Given data A random sample of 200 e-mail messages was selected. Thirty of the messages were not business related

Given random sample size 'n' = 200

Given Thirty of the messages were not business related

let 'x' = 30

Probability of the messages were not business related or proportion

$p = \frac{x}{n} = \frac{30}{200} = 0.15$

Step(ii):-

The 90% confidence interval for the population proportion is

$(p - Z_{0.10} \sqrt{\frac{p(1-p)}{n} } , p + Z_{0.10} \sqrt{\frac{p(1-p)}{n} } )$

Level of significance ∝ = 0.90 or 0.10

The critical value Z₀.₁₀ = 1.645

The 90% confidence interval for the population proportion is

$( 0.15-1.645 \sqrt{\frac{0.15(1-0.15)}{200} } , 0.15 +1.645 \sqrt{\frac{0.15(1-0.15)}{200} } )$

on calculation, we get

(0.15 - 0.04128 , (0.15 + 0.04128)

(0.10872, 0.19128)

Conclusion:-

The 90% confidence interval for the population proportion is

(0.10872, 0.19128)

5 0

3 years ago

a bag contains 120 some are red and the rest are black. There are 19 marbles for every black marble how many red marbles are in

Tema [17]

Answer:

The number of red marbles in the bag are 114.

Step-by-step explanation:

Given:

Total marbles in the bag is 120. There are 19 marbles for every black marble.

Now, to get how many red marbles in the bag.

Let the black marbles be $x$ .

And the red marbles be $19x$ .

According to question:

$x+19x=120$

$20x=120$

Dividing both sides by 20 we get:

$\frac{20x}{20}=\frac{120}{20}$

$x=6$

Black marbles = 6

So, the red marbles = 19×6 = 114.

Therefore, the number of red marbles in the bag are 114.

7 0

4 years ago

The table shows the number of hours basketball players practiced each week and the number of baskets each player scored durin

aniked [119]

Answer:

26 -- --- --- -- --- Good Luck!

Step-by-step explanation:

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3 years ago