All categories

3 years ago

Help please. I think it's B but not sure.

Mathematics

1 answer:

Ludmilka [50]3 years ago

8 0

Answer:

I am pretty sure the answer is B

Step-by-step explanation:

Because when you look at the other coordinates it doesn't make sense

You might be interested in

Four times the sum n plus 10 is 34 what is the value of n?

vazorg [7]

Answer:

4(10+n)=34

40+4n=34

4n=-6

n=-6/4=-3/2

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers

The area of a rectangle is 28square miles. The length is 7 miles.

Masja [62]

Area=length times width
area=28
length=7

28=7 times width
divide both sides by 7
4=width

the width is 4 miles
and perimiter is 22mi

6 0

3 years ago

There are 300 raisins in 5 boxes of raisins. Which of the following expresses the ratio of boxes to raisins?

olga_2 [115]

The answer would be 1:60

6 0

3 years ago

Read 2 more answers

A house as purchases for $ 6780000.

yarga [219]

Answer:

Please check the explanation.

Step-by-step explanation:

As there are 1000000 units in 1 million

i.e.

1 million = 1000000 units

A house as purchases for $6780000.

Thus, the purchase price in million will be:

6780000/1000000 = 6.78 million

purchase price in millions nearest to an integer

As the number we are rounding is followed by 7, so will be round the number up.

Therefore,

$6780000 rounded to the nearest million = $7,000,000

4 0

3 years ago

A flea jumps from the ground to a height of 30 cm and travels 15 cm horizontally from where it started. Suppose the origin is lo

adelina 88 [10]

Answer:

$y=-\frac{8}{15}x^2+8x$

Step-by-step explanation:

Consider the equation that shows flea's motion is $y=ax^2+bx+c$ .

Since the origin is located at the point from where the flea jumped,

So, $y=ax^2+bx+c$ passes through (0,0).

That is, (0,0) must satisfy $y=ax^2+bx+c$ ,

$0=a(0)^2+b(0)+c$

$\implies c =0$

Now, it travels 15 cm horizontally from where it started.

That is, $y=ax^2+bx+c$ passes through (15,0).

$0=a(15)^2+b(15)+c$

$0=a(225)+b(15)$ (Because c=0)

$225a+15b=0$ ...... (1)

Again, it jumps from the ground to a height of 30 cm,

So, the y-coordinate of vertex of $y=ax^2+bx+c$ is 30.

Now, the x-coordinate of vertex of the quadratic function must be half of the distance from its starting point to final point.

That is, x-coordinate of the vertex = $\frac{15}{2}$ = 7.5,

Thus, vertex = (7.5, 30)

(7.5, 30) must satisfy $y=ax^2+bx+c$

That is, $30=a(7.5)^2+b(7.5)+c$

$30=56.25a+7.5b$

$56.25a+7.5b=30$ ...... (2)

Equation (1) - 2 × equation (2),

225a - 112.5a = -60

112.5a = -60

$\implies a = -\frac{60}{112.5}=-\frac{8}{15}$

From equation (1),

$225(-\frac{8}{15})+15b = 0$

$-120+15b=0$

$15b=120$

$b=8$

Substitute the values of a, b and c in the quadratic equation $y=ax^2+bx+c$ ,

$y=-\frac{8}{15}x^2+8x$

Which is the required quadratic equation.

6 0

3 years ago