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3 years ago

I NEED FAST ANSWERS PLZ

Mathematics

1 answer:

musickatia [10]3 years ago

4 0

9514 1404 393

Answer:

3.6 inches

Step-by-step explanation:

A suitable proportion is ...

map inches / ground feet = 1.5/2.5 = x/6

Multiplying by 6, we find ...

x = 6(1.5/2.5) = 3.6

3.6 inches on the map would represent 6 feet on the ground.

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Values of k for which the quadratic equation 2x - kx + k 0 has equal roots is

WARRIOR [948]

Answer:

The answer is D.

Step-by-step explanation:

We have to apply Discriminant Law. When a quadratic equation, ax² + bx + c = 0 has equal roots so the discriminant will be 0. Then, you have to substitute the values into the formula :

$D = {b}^{2} - 4ac$

$let \: D = 0 ,a = 2,b = k,c = k$

$0 = {k}^{2} - 4(2)(k)$

${k}^{2} - 8k = 0$

$k(k - 8) = 0$

$k = 0$

$k - 8 = 0$

$k = 8$

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3 years ago

X + y = 8 Let x = 6. What is y? Enter the correct answer. DONE 00000

yuradex [85]

Answer:

y=2

Step-by-step explanation:

x+y=8

6+y=8

6+2=8

so y=2

5 0

3 years ago

Read 2 more answers

A certain ferry moves up and down a river between Town A and B. It takes the ferry two hours to travel to Town A and only an hou

Y_Kistochka [10]

Answer:

The distance between two cities is 60 miles.

Step-by-step explanation:

Time taken to travel from B to A = 2 hours

Time taken to travel from A to B = 1.5 hours

Current speed = 5 mph

Let the speed of ferry in still water = u mph

When the ferry moves with the current, it will taken lesser time (i.e. A to B) and when it moves against the current it will take more time (i.e. B to A).

Let the distance between the two cities A and B = D miles

While moving with the current, speed = $(u+5)\ mph$

While moving against the current, speed = $(u-5)\ mph$

Formula for Distance = Speed $\times$ Time

Distance traveled in each case is same i.e. D.

So,

$D = (u+5) \times 1.5 = (u-5) \times 2\\\Rightarrow 1.5u+7.5=2u-10\\\Rightarrow 0.5u =17.5\\\Rightarrow u = \dfrac{175}{5}\\\Rightarrow u = 35 \ mph$

Now,

$D = (u+5) \times 1.5\\\Rightarrow D =(35+5) \times 1.5\\\Rightarrow D =(40) \times 1.5\\\Rightarrow \bold{D =60\ miles}$

So, the distance between two cities is 60 miles.

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3 years ago

The tires on your bicycle have a diameter of 9 inches. How many rotations does each tire make when you travel 300 feet? Round yo

kherson [118]

So we know that the tire is 9 inches and its traveling 300 feet so
1 foot = 12 inches
300 feet x 12 = 3600 inches
3600 inches divided by 9 = 400 rotations
I hope this helped you i wld apprecite brainleist

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2 years ago

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There are 318 teachers at a college. Among a sample of 115 teachers from this college, 67 have doctorates. Based on this sample,

Fofino [41]

Answer: $\dfrac{67}{115}$ or 0.5826