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3 years ago

11

Please help me outtttttttttttt

1 answer:

Sunny_sXe [5.5K]3 years ago

8 0

0.009 kilogram because you do 0.3 kilogram times 0.03 and you get 0.009 kilograms

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25% of what number equals 100

tatiyna

Answer:

its 400

Step-by-step explanation:

4 0

3 years ago

Given three points of a quadratic function, find the equation that defines the function: (-2, 20)(0, -2)(1, -4)

Stels [109]

Answer:

$y=3x^2-5x-2$

Step-by-step explanation:

Let the quadratic function be

$y=ax^2+bx+c$

The given points must satisfy this function;

Substitute $(-2,20)$ .

$20=4a-2b+c..(1)$

Substitute (0,-2)

$c=-2...(2)$

Substitute (1,-4);

$-4=a+b+c...(3)$

Put equation (2) into equation (1)

$20=4a-2b+-2$

$4a-2b=22$

$2a-b=11...(4)$

Put equation (2) into equation (3)

$-4=a+b-2...(3)$

$a+b=-2...(5)$

Add equation (4) and (5)

$3a=9$

Divide both sides by 3

$a=3$

Put a=3 in equation 5.

$3+b=-2$

$b=-2-3$

$b=-5$

The quadratic function is;

$y=3x^2-5x-2$

6 0

3 years ago

Point a is at -2,4 and point c is at 4,7. Find the coordinates of point b on ac such that the ratio is 1:3

Andrews [41]

We have been given that point a is at $(-2,4)$ and point c is at $(4,7)$ . We are asked to find the coordinates of point b on segment ac such that the ratio is 1:3.

We will use section formula to solve our given problem.

When point P divides a segment internally in the ratio m:n, the coordinates of point P would be:

$[x=\frac{mx_2+nx_1}{m+n}, y=\frac{my_2+ny_1}{m+n}]$

Let point $(-2,4)=(x_1,y_1)$ and point $(4,7)=(x_2,y_2)$ .

$[x=\frac{1(4)+3(-2)}{1+3}, y=\frac{1(7)+3(4)}{1+3}]$

$[x=\frac{4-6}{4}, y=\frac{7+12}{4}]$

$[x=\frac{-2}{4}, y=\frac{19}{4}]$

$[x=-0.5, y=4.75]$

Therefore, the coordinates of point 'b' would be $(-0.5,4.75)$ .

6 0

4 years ago

Can you guy's please help. A concert hall has 3,288 seats .

pantera1 [17]

Answer:

3,300

Step-by-step explanation:

4 0

3 years ago

Marissa has a goal of shooting exactly 400 three–pointers during her basketball practice every week. She has already shot 105 of

m_a_m_a [10]

Answer: 5t = 400-105

Step-by-step explanation:

Let t= Number of three–pointers Marissa has to average over the next 5 days to reach her goal. .

Goal = 400 three–pointers every week.

Marissa has already shot = 105 three–pointers

Remaining shots to achieve target (5t) = Goal - (Marissa has already shot)

i.e. 5t = 400-105 (required equation)

⇒ 5t = 295

⇒ t = 59

hence, she need to make 59 shots per day for next 5 days.

4 0

3 years ago