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3 years ago

A car drives 10 1/2 miles in 1/6 hour. what is its speed in miles per hour

Mathematics

1 answer:

EastWind [94]3 years ago

7 0

(Credit to guy/girl above) 63 miles 10 1/2 x 6 is 63.

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F(x)x+4/x solve for x

olga_2 [115]

Answer:

depending on how your equation is actually written with (x+4)/x.. or wit x + 4/x.. your answer will be one of the two images below..

Step-by-step explanation:

Combine expressions and isolate the variable x.

8 0

3 years ago

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What is the value of x?<br> 4x+2-(3+3x)=7

PolarNik [594]

Answer:

x= 8

Step-by-step explanation:

Step 1- Distribute into the parenthesis by 1.

4x+2+3(-1)+3(-1)x= 7

Step 2- Simplify.

4x+2-3-3x= 7

Step 3- Add common variables.

(4x-3x)+(2-3)

1x-1= 7

Step 4- Add 1 to both sides.

1x-1= 7

+1 +1

1x= 8

Step 5- Divide both sides by 1.

1x= 8

1 1

x= 8

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5 0

3 years ago

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Phyllis invested 51000 dollars, a portion earning a simple interest rate of 4 percent per year and the rest earning a rate of 7

Liono4ka [1.6K]

Answer:

Phyllis invested $11,000 at a simple interest rate of 7 percent per year and $40,000 at a simple interest rate of 4 percent per year.

Step-by-step explanation:

From the information provided, you can write the following equations:

x+y=51000 (1)

0.04x+0.07y=2370 (2), where

x is the portion earning a simple interest rate of 4 percent per year

y is the portion earning a simple interest rate of 7 percent per year

First, you can isolate x in (1):

x=51000-y (3)

Now, you can replace (3) in (2) and solve for y:

0.04(51000-y)+0.07y=2370

2040-0.04y+0.07y=2370

0.03y=330

y=330/0.03

y=11000

Then, you can replace the value of y in (3) to find the value of x:

x=51000-11000

x=40000

According to this, the answer is that Phyllis invested $11,000 at a simple interest rate of 7 percent per year and $40,000 at a simple interest rate of 4 percent per year.

3 0

3 years ago

Find the value of x so that the line passing through (10, 5) and (x, 9) has a slope of -2.

Verdich [7]

Ok, so here, we need to use the slope formula which is:

(y2 - y1)/(x2-x1)

y2 = 9
y1 = 5

x2 = x
x1 = 10

So:

(9-5)/(x-10) = -2

Now, we just solve for x,

9-5 = -2(x-10)

4 = -2x+20

2x = 16

x = 8

4 0

4 years ago

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Four time a number r plus half a number s equals 12. Twice the number r plus one fourth of the numbers s equals 8. What are the

Snezhnost [94]

The system of equations have no solution.

Explanation:

The equations are $4r+\frac{1}{2}s=12$ and $2r+\frac{1}{4} s=8$