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kolbaska11 [484]
2 years ago
9

Simplify: 5(x-12x^2)+3(4x+7x^2)

Mathematics
2 answers:
VladimirAG [237]2 years ago
7 0

Answer:

-39x^2 + 17x

Step-by-step explanation:

= 5x - 60x^2 + 3 (4x+7x^2)

= 5x - 60x^2 + 12x + 21x^2

= -39x^2 + 17x

photoshop1234 [79]2 years ago
7 0

Answer:

-39x^2 + 17x is correct

Step-by-step explanation:

I checked it

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valkas [14]

Answer: X= 3.75

HOPE THIS HELPS:)))))

Step-by-step explanation:

5 0
2 years ago
A fitted multiple regression equation is Y = 28 + 5X1 - 4X2 + 7X3 + 2X4. When X1 increases 2 units and X2 increases 2 units as w
ad-work [718]

Answer:

A. Increase by 2

Step-by-step explanation:

Given that a  fitted multiple regression equation is

Y = 28 + 5X_1 -4X_2 + 7X_3 + 2X_4

This is a multiple regression line with dependent variable y and independent variables x1, x2, x3 and x4

The coefficients of independent variables represent the slope.

In other words the coefficients represent the rate of change of y when xi is changed by 1 unit.

Given that x3 and x4 remain unchanged and x1 increases by 2 and x2 by 2 units

Since slope of x1 is 5, we find for one unit change in x1 we can have 5 units change in y

i.e. for 2 units change in x1, we expect 10 units change in Y

Similarly for 2 units change in x2, we expect -2(4) units change in Y

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10-8 =2 change in y

Since positive 2, there is an increase by 2

A. Increase by 2

5 0
3 years ago
18.
Andru [333]

Answer:

  E.  19

Step-by-step explanation:

  z = (5)(11)(2·2·7)(2·19)

  z = 2³·5·7·11·19

The greatest prime factor is 19.

4 0
2 years ago
3x-15+10m-2x ; x=5 and m=7 <br> evaluate the expression for the given value of the variable.
lianna [129]
3(5)-15+10(7)-2(5)
15-15+70-10
=60
The answer is 60
3 0
3 years ago
I just need some help on a few math questions. i'm very bad at math sorry :(
Zinaida [17]

Answer:

Q1) D

Q2) A

Q3) A

Q4) I'm sorry I can't figure this one out

Q5)2.7

Step-by-step explanation:

7 0
3 years ago
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