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nika2105 [10]
3 years ago
13

7x-8y=13 can someone please help me

Mathematics
1 answer:
EleoNora [17]3 years ago
8 0

Answer:

A

Step-by-step explanation:

Sub in the point given, (3, 1), and check if the equation holds true

7(3) - 8(1) = 13

21 - 8 = 13

13 = 13

The equation held true, therefore, the point (3, 1) is a solution

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A train from Portland, Oregon, to Los Angeles, California, travels at an average speed of 60 miles per hour and covers a distanc
seropon [69]

Answer:

The train need to leave Portland at 03:27 am

Step-by-step explanation:

step 1

Find out how long it takes the train to travel from Portland, Oregon, to Los Angeles, California

Remember that

The speed is equal to divide the distance by the time

so

The time is equal to divide the distance by the speed

Let

s ---> the speed in miles per hour

d ---> the distance in miles

t ---> the time in hours

t=\frac{d}{s}

we have

d=963\ mi

s=60\ mi/h

substitute

t=\frac{963}{60}=16.05\ hours

step 2

Adds 30 minutes (time it takes to get from the train station to her aunt's house)

Remember that

30\ minutes=0.50\ hours

16.05+0.50=16.55\ hours

Convert to minutes

16.55\ h=16.55(60)\ min=993\ min

step 3

Remember that

8 p.m=20:00\ hrs

Convert to minutes

20(60)=1,200\ min

Subtract 993 minutes from 1,200 minutes

1,200-993=207\ min

Convert to hours+minutes

207\ min=207/60=3.45\ hours

0.45\ h=0.45(60)=27\ min

so

3\ h+27\ min

00:00 + 03:27=03:27\ am

therefore

The train need to leave Portland at 03:27 am

8 0
4 years ago
Graph a line with a slope of -5 that contains the point -3,-4
guapka [62]

Answer:

The equation of the line is 5x + y + 19 = 0

Step-by-step explanation:

The equation of the line with slope 'm' and given a point (x₁, y₁) passing through it we use the Slope - one - point form which is given by:

                                    y - y₁ = m(x - x₁)

The point given is: (-3, -4) and the slope is -5.

We get the equation of the line to be:

y - (-4) = -5(x - (-3))

⇒ y + 4 = -5(x + 3)

⇒ y + 4 = -5x - 15

⇒ 5x + y + 19 = 0. is the required equation of the line.

4 0
4 years ago
A linear function has a slope of 8/3 and passes through the point (0,5). What is the equation of the line?
MArishka [77]

This problem already gave us the slope and y-intercept, so all that's left to do is plug those two values into slope-intercept form.

Slope-Intercept Form: y = mx + b

---m is the slope

---b is the y-intercept

y = 8/3x + 5

Hope this helps!! :)

3 0
3 years ago
Read 2 more answers
Choose the equation that represents the graph below: (1 point)
nata0808 [166]
It would be A. <span>y = −2x − 4.
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4 0
4 years ago
Which statement is true for all parallelograms? (1 point)
Aloiza [94]

The opposite sides are equal in length.

Step-by-step explanation:

Opposite sides of a parallelogram must be congruent. This is a property of all parralelograms.

8 0
2 years ago
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