Someone please help me I dont understand

Which math expression represents the phrase? 8 times the difference of a number and 3

s2008m [1.1K]

Letter A is the correct answer because you can obviously exit out c and d, but yo get a good phrase you might as well have some parentheses to make this work because without it, would be confusing :)

3 0

4 years ago

Read 2 more answers

PLEASE HELP ASAP! BRAINLIEST TO BEST/RIGHT ANSWER

trasher [3.6K]

The CORRECT answer is B because the person got it wrong saying A

6 0

4 years ago

Suzie has teach practice for 1 hour on Tuesday and 2 hours on Thursday. How many hours does suzie go to track practice in 15 wee

MAVERICK [17]

Answer:

45 hours

Step-by-step explanation:

Practice duration :

Tuesday = 1 hour

Thursday = 2 hours

Hours per week = (Number of hours on Tuesday + number of hours on Thursday)

Hours per week = (1 + 2) = 3 hours

Practice hours over 15 Weeks :

3 * 15 = 45 hours

7 0

3 years ago

Graph the equations

timurjin [86]

Answer:

We conclude that, at 4 minutes, both will have the same height which is 200 feet.

Step-by-step explanation:

Given the system of equations

$y=400+50x$

$y=300+25x$

Important Tip:

The point of intersection of the two lines would give us the point at which both have the same height.

Graphing the system of equations

The graph of the equation y = 400 + 50x

First, determine the y-intercept of the equation y = 400 + 50x by substituting x = 0

$y = 400 + 50x$

$y = 400 + 50(0)$

$y = 400 + 0$

$y = 400$

Thus, we determine that the ordered pair (0, 400) represents the y-intercept of the equation y = 400 + 50x.

Next, determine the x-intercept of the graph of the equation y = 400 + 50x by substituting y = 0

$y = 400 + 50x$

$0=400+50x$

switch sides

$400+50x=0$

Subtract 400 from both sides

$400+50x-400=0-400$

Simplify

$50x=-400$

Divide both sides by 50

$\frac{50x}{50}=\frac{-400}{50}$

Simplify

$x=-8$

Thus, we determine that the ordered pair (-8, 0) represents the x-intercept of the equation y = 400 + 50x.

Important Tip:

The point at which the graph crosses the y-axis is called the y-intercept.

The point at which the graph crosses the x-axis is called the x-intercept.

The red graph on the diagram represents the equation y = 400 + 50x having the y-intercept (0, 400) and x-intercept (-8, 0)

Please check the attached diagram.

The graph of the equation y = 300 + 25x

Now, determine the y-intercept of the equation y = 300 + 25x by substituting x = 0

$y = 300 + 25x$

$y = 300 + 25(0)$

$y = 300 + 0$

$y = 300$

Thus, we determine that the ordered pair (0, 300) represents the y-intercept of the equation y = 300 + 25x.

Next, determine the x-intercept of the graph of the equation y = 300 + 25x by substituting y = 0

$y=300+25x$

$0 = 300 + 25x$

switch sides

$300+25x=0$

Subtract 300 from both sides

$300+25x-300=0-300$

Simplify

$25x=-300$

Divide both sides by 25

$\frac{25x}{25}=\frac{-300}{25}$

Simplify

$x=-12$

Thus, we determine that the ordered pair (-12, 0) represents the x-intercept of the equation y = 300 + 25x.

The blue graph on the diagram represents the equation y = 300 + 25x having the y-intercept (0, 300) and x-intercept (-12, 0)

Please check the attached diagram.

Analyze the POINT OF INTERSECTION:

As we already know that the point of intersection of the two lines would give us the point at which both have the same height.

The diagram indicates that:

at x = -4, the value of y = 200.

It is the point where both lines meet.

Thus, the point of intersection of the two lines is:

(x, y) = (-4, 200)

Conclusion:

As x represents the time in minutes and y represents the height in feet.

Thus, we conclude that at x = 4 minutes, both will have the same height i.e. y = 200 feet

Therefore, we conclude that, at 4 minutes, both will have the same height which is 200 feet.

7 0

3 years ago

PLZ HELP!!!! Explain 72. Determine the value of r so that a line through the points with the coordinates (r, 4) and (-2,3) has

avanturin [10]

9514 1404 393

Answer:

d. 2

Step-by-step explanation:

The point-slope form of the equation for the line can make use of the given slope and point:

y -k = m(x -h) . . . . . line with slope m through point (h, k)

y -3 = 1/4(x +2) . . . . line with slope 1/4 through point (-2, 3)

Filling in the unknown point values, we have ...

4 -3 = 1/4(r +2)

4 = r + 2

2 = r

_____

Alternate solution

The way the question is worded, you seem to be expected to use the slope formula.

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

For the given points and slope, you have ...

1/4 = (3 -4)/(-2 -r)

-2 -r = 4(-1) . . . cross multiply

2 = r . . . . . . . . add r+4 to both sides

3 0

3 years ago