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Romashka-Z-Leto [24]
3 years ago
10

The slope-intercept?

Mathematics
1 answer:
Crazy boy [7]3 years ago
4 0
To put it into slope intercept form, let's start by writing the equation format. It will be y=mx+b where m is the slope and b is the y intercept. Let's find the y intercept first. On the graph the line crosses the y axis at -9. Now we have one part of the equation: y=mx+(-9) aka y=mx-9. The line seems to go up one and over one from the point (0,-9). That means that the slope is then 1 since it rises 1 and runs 1. Now we have an equation of y=1x-9. But x doesn't need to have the coefficient of 1 since that is the default therefore the finished equation is y=x-9.
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Taxi A charges a fee of $3.50, plus $1.75 per mile. Taxi B charges a few of $1.25, plus $2.00 per mile. At what distance would t
frez [133]
Taxi A
1mile £3.50+£1.75=£5.25
Taxi B
1mile £1.25+£2.00=£3.25

Taxi A
2miles £3.50+£3.50=£7.00
Taxi B
2miles £1.25+£4.00=£5.25

Taxi A
3miles £3.50+£5.25=£8.75
Taxi B
3miles £1.25+£6.00=£7.25

Taxi A
4miles £3.50+£7.00=£10.50
Taxi B
4miles £1.25+£8.00=£9.25

Taxi A
5miles £3.50+£8.75=£12.25
Taxi B
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Taxi A
6miles £3.50+£10.50=£14.00
Taxi B
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Taxi A
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Taxi B
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Taxi A
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Taxi B
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Taxi A
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Taxi B
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^^^
They would have to drive 9 miles for the taxi to cost the same.

Hope this helped, this is the longest way to work it out but also the simplest.
6 0
2 years ago
What is the answer for m^2-5m-14=0?
tensa zangetsu [6.8K]

Answer: m = 7 or -2

Step-by-step explanation:

Quadratic Formula!  \frac{{-b (+/-)\sqrt{(b^{2}-4ac }}}{2a}

Polynomial Form: ax^{2} +bx+c

So in this example a: 1  b: -5  c: -14

You get:\frac{{-(-5) (+/-)\sqrt{((-5)^{2}-4(1)(-14) }}}{2(1)}

m = 7 or -2

Check by plugging a value back in for m

(7)^{2} -5(7)-14=0?\\(-2)^{2} -5(-2)-14=0?\\

True for both.

3 0
3 years ago
The price of a computer was decreased by 30% to £147. What was the price before the decrease?
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Answer:

£210

Step-by-step explanation:

A decrease of 30% represents 70% of the original cost.

100% represents the original cost

Divide the price by 70 to find 1% then multiply by 100 for original cost

original cost = \frac{147}{70} × 100 = 2.1 × 100 = £210

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