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umka21 [38]
3 years ago
11

The product of 9 and sum of a number x and 12

Mathematics
1 answer:
mr_godi [17]3 years ago
5 0

Answer:

9(x + 19)

Step-by-step explanation:

Product is a multiplication key word where you'll usually always put parenthesis when multiplying, and where the keyword sum comes you'd add x and 12 for your equation :)

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If a plane can travel 490 miles per hour with the wind and 430 miles per hour against the​ wind, find the speed of the wind and
zavuch27 [327]

let the speed of plane in still air be x and that wind be y

therefore:

x+y=490

x-y=390

next we solve for the values of x and y, first we add the above equations. This will give us:

2x=880

x=880/2

x=440 miles per hour.

substituting the value of x in one of the equations and solving for y we get:

440+y=490

y=490-440

y=50 miles per hour

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3 years ago
Somebody help me I’m struggling
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Answer:

A. $ (5 + 2x), B. = $ 305

Step-by-step explanation:

x miles

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Tema [17]
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8 0
2 years ago
What is the equation of the line that passes through the points (0,4) and (3,-2)?
Nadusha1986 [10]

***NOTE: Please check that you wrote the numbers in the question/answer choices correctly. The answer to this problem doesn't match the answer choice. Thank you!

Remember that the slope intercept formula is:

y = mx + b

m is the slope

b is the y-intercept

First let's find the slope (m)

The formula to find slope using two points is

\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

In this case...

y_{2} =-2\\y_{1} =4\\x_{2} =3\\x_{1} =0

^^^Plug these numbers into the formula for slope...

\frac{-2-4}{3 - (0)}

\frac{-6}{3}

-2

^^^This is your slope

Here is what we have so far for the slope intercept formula:

y = -2x + b

Now we must find b

To do that you must plug in a point the line goes through in the x and y of the equation, then solve for b

For this explanation we will use the point (0,4) although you could also do it with point (3, -2) and you should get the same answer  

4 = -2(0) + b

4 = 0 + b

4 = b

NOTE: For this particular problem you wouldn't technically need to go through the steps above to find b. In this case one of the points given, (0, 4) is already the y-intercept of the line (b)

y = -2x + 4

Hope this helped!

~Just a girl in love with Shawn Mendes

5 0
3 years ago
Multiply, expressing the product in scientific notation. (9.16X10−3)(5.5X1016)
Snowcat [4.5K]
Do you want the full answer


8 0
3 years ago
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