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3 years ago

11

Đường thãng oc là gì đối với ab ?tại sao?

1 answer:

AVprozaik [17]3 years ago

4 0

Answer:

Đường thãng oc là gì đối với ab ?tại sa

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How do I simplify 6x+8/4x+4?

Molodets [167]

2(3x + 4) / 2(2x + 2)
Cancel the factored 2s

3x + 4 / 2x + 2

You may need to further factor the denominator, depending on the teacher.

3x + 4 / 2(x + 1)

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3 years ago

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if a 6 ft tall tent cast a 10 ft long shadow the how long is the shadow that a 9 ft tall adult elephant casts? show work

olya-2409 [2.1K]

15ft

6/10 • 9/x

Cross multiply.

9•10=90
90/6=15

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3 years ago

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Will surveyed students at his school about whether they have ever gone snowboarding and whether they own a skateboard. He found

larisa [96]

Answer:

third graph

Step-by-step explanation:

We represent the above information in a two way frequency table.

Have Snowboarded Never Snawboarded Total

Skateboard 35 64 99

No Skateboard 13 147 160

Total 48 211 259

Therefore, the third graph is the correct answer.

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4 years ago

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Urgent!!!) pls help me out how to solve question a? using the above data given for functions ..

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3 years ago

Stu trained for a triathlon for 5 hours yesterday. He ran 5 miles and then biked 80 miles. His biking speed is 15 mph faster tha

lara31 [8.8K]

Answer:

Step-by-step explanation:

Given as :

The distance cover while running = $D_1$ = 5 miles

Let The speed for running = $S_1$

The distance cover with bike = $D_2$ = 80 miles

The speed for biking = $S_2$ = 15 mph + $S_1$

Total Time taken = 5 hours

Now Time = $\dfrac{\textrm Distance}{\textrm Speed}$

∴ 5 hour = $\frac{D_1}{S_1}$ + $\frac{D_2}{S_2}$

Or, 5 hour = $\frac{5}{S_1}$ + $\frac{80}{15+S_1}$

Or, 5 hour = $\frac{75 + 5 S_1 + 80 S_1}{S_1(15+S_1)}$

or, 5 × ( $S_1^{2}+15 S_1$ ) = $85 S_1 + 75$

Or, $5 S_1^{2} + 75 S_1$ - $85 S_1 - 75$ = 0

or, $5 S_1^{2} -10 S_1 - 75$ = 0

or, $S_1^{2} -2 S_1 - 15$ = 0

Or, $S_1^{2} -3 S_1 + 5 S_1- 15$ = 0

Or, $S_1 (S_1 - 3) + 5 (S_1 - 3)$ = 0

Or, $(S_1 - 3) ( S_1 + 5 )$ = 0

∴ $S_1$ = 3 , - 5

So, the running speed = 3 mile per hour

And the biking speed = 15 mph + 3 mph = 18 mile per hour

Hence The running speed of Stu is 3 mile per hour . Answer

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3 years ago