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Marianna [84]
3 years ago
5

What is two more than 4 times a number is -18 translated and solved

Mathematics
1 answer:
Brrunno [24]3 years ago
3 0

Answer:

n=-5

Step-by-step explanation:

Let "n" represent the unknown number.

So, the equation asks for 4n and two more, or +2, that is all equal to -18.

So, your equation will be:

4n+2=-18

First, subtract 2 from both sides:

4n+2-2=-18-2\\4n=-20

Then, divide both sides by 4:

\frac{4n}{4}=\frac{-20}{4}\\n=-5

Therefore, n=-5.

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Find the exact surface area of the following. The exact surface area is
Nataliya [291]

Answer:

Surface area: 4323pi

Fill the box with the value "4323", as there is a "pi" after the box.

Step-by-step explanation:

We need to find the surface area of the cone (without the base) and the surface area of the semi sphere (without the base).

The surface area of the cone, without the base, is:

S1 = pi * r * s

Where s is the slant height.

To find s, we can use the Pythagoras' theorem with the radius and the height:

s^2 = h^2 + r^2

s^2 = 56^2 + 33^2 = 4225

s = 65

So the surface area is:

S1 = pi * 33 * 65 = 2145pi

Now, to find the surface area of the semi sphere, we just need to find half of the surface area of a sphere:

S2 = (1/2) * 4 * pi * r^2

S2 = 2 * pi * 33^2 = 2178pi

Finally to find the total surface area we just need to sum both surface areas:

S = S1 + S2 = 2145pi + 2178pi = 4323pi.

As after the box to answer there is a pi, we just need to fill the box with the value "4323"

7 0
3 years ago
Is smoking during pregnancy associated with premature births? To investigate this question, researchers selected a random sample
horrorfan [7]

Answer:

Confidence interval is 128±2.326 days (between 125.674 days and 130.326 days) in 90% confidence level

Step-by-step explanation:

Confidence interval can be calculated as M±ME where

  • M is the average pregnancy days of smoking women and
  • ME is the margin of error in 90% confidence level.

Margin of Error in 90% confidence level can be calculated using the formula:

ME=\frac{z*s}{\sqrt{N} } where

  • z is the z-value in 90% confidence level (1.645)
  • s is the standard deviation of pregnancy length (16)
  • N is the sample size (128)

putting these  numbers in the formula, we get:

ME=\frac{1.645*16}{\sqrt{128} } =2.326

then confidence interval is 128±2.326 ( between 125.674 and 130.326 ) in 90% confidence level

5 0
3 years ago
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kari74 [83]

Answer:

it is f

Step-by-step explanation:

7 0
3 years ago
Plz help Large cheese pizzas cost $5 each and large one-topping pizzas cost $6 each write an equation that represents the total
Komok [63]

Answer:

T = 5c +5d,    where unit of the equation is $.

Step-by-step explanation:

Cost of 1 large cheese  pizza = $5

No. of large cheese pizza = c

therefore

cost of c  large cheese pizza = c*Cost of 1 large cheese  pizza = $5c

Cost of 1 large one topping  pizza = $6

No. of large one topping pizza = d

therefore

cost of d  large one topping pizza = d*Cost of 1 large one topping  pizza =             cost of d  large one topping pizza = $6d  

Total cost of  c  large cheese pizza and cost of d  large one topping pizza

= $5c +$6d

total cost is represented by T

thus, T = $5c +$5d  Answer

4 0
3 years ago
A math tutor makes $12 an hour for the first 40 hours worked
tiny-mole [99]
480 bucks:D :DmD there you go
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3 years ago
Read 2 more answers
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