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skad [1K]
3 years ago
9

Write an equation with a slope of -7 and a y-intercept of (0,4)

Mathematics
1 answer:
Tanzania [10]3 years ago
3 0

Answer:

Step-by-step explanation:

y - 4 = -7(x - 0)

y = -7x + 4

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Graph the equation 8x-4y=56 then, trace the graph to find the missing value in the coordinate pairs below
Marysya12 [62]
Just look at it this way do 8(1) instead of x and graph that on the x axis
then do 4(1)instead of y and graph on the y axis then figure out which numbers you need to keep inputting until you reach 56 on the graph.
5 0
3 years ago
Read 2 more answers
A ferry departs from a port along the Sands River at 10:00 am. The ferry travels at a speed of 15 mph in still water and returns
jek_recluse [69]

Answer:

Speed of river's current = 5 mph

Step-by-step explanation:

Let 'd' be the distance covered  

 Let x be the speed of the rivers current

Speed upstream = 15-x

speed downstream = 15+x

Time = distance / speed

time upstream = \frac{d}{15-x}

time downstream = \frac{d}{15+x}

the ferry trip upstream takes twice as long as its return trip downstream

\frac{d}{15-x}= \frac{2d}{15+x}

divide both sides by d

\frac{1}{15-x}= \frac{2}{15+x}

cross multiply

15+x= 2(15-x)

15+x= 30-2x

Add 2x on both sideds

15+3x= 30

subtract 15 from both sides and divide by 3

3x=15

x=5

Speed of river's current = 5 mph

8 0
3 years ago
What is the value of the expression below when y= 8 and z= 9?
g100num [7]

Answer:

27

Step-by-step explanation:

5y-2z

1.plug in

5(8)-2(9)

2.solve

5(8)=45

3.solve

2(9)=18

4.subtract

45-18=27

___________________________

answered by aurinda

hope it helps:)

____________________________

4 0
3 years ago
Elizabeth can jog 1 1/2 miles in 1/2 hour. How many miles can she jog in 1 hour
Nadya [2.5K]

Answer:

3 miles

Step-by-step explanation:

1/2 hour is 30 minutes so 1.5 x 2 is 3

5 0
3 years ago
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Help please, my brains is empty :o(
den301095 [7]

Answer:

I think 5 and 5 are equal so the angles are equal which are 70,70

Step-by-step explanation:

70+70+x=180

140+x=180

x=40

6 0
3 years ago
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