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2 years ago

13

PLS HELP ASAP GIVING 35 POINTS... If a rock has a mass of 1.5 - g / mL and displaces 5-mI. of water, what is the mass of the roc

k?

1 answer:

Sladkaya [172]2 years ago

4 0

The answer is 4.5 grams(:

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For the multiple regression model Y with hat on top equals 40 plus 15 X subscript 1 minus 10 X subscript 2 plus 5 X subscript 3,

kvasek [131]

Answer:

When x1 and x2 decrease 4 units, y decreases by 20 units

Step-by-step explanation:

The regression model is

$y=40+15x_1-10x_2+5x_3$

We have to calculate y for a decrease of 4 units in x1 and x2. For this we have to calculate the variation of y in function of x1 and x2.

As it is a linear regression model, we have:

$\Delta y=15\Delta x_1-10\Delta x_2$

For a variation in 4 units of x1 and x2, we have

$\Delta y=15\Delta x_1-10\Delta x_2\\\\\Delta y=15(-4)-10(-4)=-60+40=-20$

6 0

3 years ago

SOMEONE PLEASE ANSWER ASAP FOR BRAINLIEST!!!!!

arsen [322]

Answer:

D. the ball has been traveling for 5 seconds when it reaches the bottom of the ramp

Step-by-step explanation:

f(x) = x²- 10x + 25

We can factor this.

What 2 numbers multiply to 25 and add to -10

-5 *-5 = 25

-5+-5 = -10

f(x) =(x-5) (x-5)

Using the zero product property, we know that it will cross the axis at x=5

At 5 seconds f(x) =0. This means the height is zero at 5 seconds

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3 years ago

Which ordered pair is a solution of the equation? 3x-y=13

Papessa [141]

Answer:

$(\frac{13}{3},0)$ and

Step-by-step explanation:

$3x-y=13 \\ \\ -y=-3x+13 \\ \\ y =3x-13$

Any point on this line will do.

For this example, let's find the x and y intercepts by plugging in 0 for x and y.

You'll get $(\frac{13}{3},0)$ and $(0,-13)$ $(0,-13)$

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3 years ago

What is -3/8 + 9/4

scoundrel [369]

This is the answer 1.875

7 0

3 years ago

In a quadrilateral MNOP the length of side MN is (4x − 7) units and the length of side ON is (7 − 3x) units. What value of x wil

artcher [175]

In a rhombus, all sides are equal.

So for the quadrilateral MNOP to be a rhombus, the given sides have to be equal. THat is

$MN=ON$

$4x-7 =7-3x$

Adding 3x to both sides and addinf 7 to both sides

$7x = 14$

Now we need to get rid of 7 and for that we do division, that is

$\frac{7x}{7} = \frac{14}{7}$

$x=2$

Correct option is the second option .

6 0

3 years ago