I don’t know how to solve someone please help

Please answer with explanation and standard form

vaieri [72.5K]

Answer:

2x - 7y = -34.

Step-by-step explanation:

As the line we want is perpendicular to y= -7/2 x + 9 it's slope will be

-1 /(-7/2) = 2/7.

Now we find the point of intersection ofn the 2 given lines:

x + y = 10

3x - 4y = -12

Multiply the first equation by -3:

-3x - 3y = -30

Now add this last equation to the second one:

-7y = -42

y = 6

Plug y = 6 into the first equation:

x + 6 = 10

x = 4.

So the point of intersection is (4, 6) and the equation we want passes through this, so using the point-slope form of straight line we have:

y - 6 = 2/7(x - 4)

7y - 42 = 2(x - 4)

7y - 42 = 2x - 8

2x - 7y = -42 + 8

2x - 7y = -34

7 0

3 years ago

Read 2 more answers

A dump truck is unloading sand that falls into a conical pile. Find the height of the cone when the diameter of the pile is 16 f

Rudiy27

Answer:

8.21

Step-by-step explanation:

formula is:

V= 3 $\frac{volume}{pie(diameter)}$

you plug everything in but when you go to plug in your diameter you need to use the radius. the radius is always half of the diameter.

6 0

3 years ago

David hikes 21/4 miles in 1/2 an hour. What is his rate in miles per hour? At this rate, how long will it take him to walk 18 mi

harkovskaia [24]

Answer:

A) speed = 10.5 miles per hour

B) Time taken by him = 1.714 hours

C) Distance = 10.5 mph × 7 hours = 73.5 miles

Step-by-step explanation:

Given as :

The distance cover by David = $\frac{21}{4}$ miles = 5.25 miles

The time taken by David = $\frac{1}{2}$ hours = 0.5 hours

Let the speed = x mile per hour

So, Distance = Speed × Time

A)or, Speed = $\frac{Distance}{Time}$

Or, Speed = $\frac{5.25}{0.5}$

∴ speed = 10.5 miles per hour

<u>B) Again The Distance cover by him = 18 miles</u>

SO, with speed 10.5 miles per hour

The Time taken by him = $\frac{Distance}{speed}$ hours

Or, Time taken by him = $\frac{18}{10.5}$ hours

∴ Time taken by him = 1.714 hours

<u>C) Again the Time taken by him = 7 hours </u>

So, Distance cover by him with speed 10.5 mph

Or, Distance = 10.5 mph × 7 hours = 73.5 miles

A) speed = 10.5 miles per hour

B) Time taken by him = 1.714 hours

C) Distance = 10.5 mph × 7 hours = 73.5 miles Answes

8 0

3 years ago

When you round a number to the nearest hundred you get 13,600 and when you round it to the nearest thousand you get 14,00.What w

Viefleur [7K]

The original number would be 13,555 .

6 0

3 years ago

Casey invested $1,225 in a certain bond that pays 19% interest compounded annually. How long will it take for Brad’s investment

BigorU [14]

Answer:

6 months and 24 days

Step-by-step explanation:

6 0

3 years ago