I understand some of this but this ones got me stumped i tried pemdas but im still lost

Answers

Answer 1

Answer: Just replace $x$ with its given value:

$9x^(2)-4x-3~~~~\text{where }x=-2\n \n \n 9\cdot (-2)^(2)-4\cdot (-2)-3\n \n =9\cdot 4+8-3\n \n =36+8-3\n \n =41$

Related Questions

Cos2a=1-2sin^2a for all values of a.
Marking as brainliest:) Given that f(x)=-x+4 and g(x)=-2x-3, solve for f(g(x)) when x=2.
Owen buys 3 apples, 5 bananas, and 7 carrots from Giant. What is the ratio of bananas to carrots? What is the ratio of carrots to apples?
Which of the following is true about a parallelogram? A. Opposite angles of a parallelogram are not congruent. B. Parallelograms always have four congruent sides. C. Only two sides of a parallelogram are parallel. D. The diagonals of a parallelogram always bisect each other.
Simplify the expression (3+i)-(2-2i)

How many baseball teams of 9 members can be formed from 14 players?

Answers

14-9=5
So you will b able to get 1 full team of 9 people

Which phrase describes the variable expression m + 5A) The Quotient of m and 5
B) 5 more than m
C) 5 less than m
D) The product of m and 5

Answers

b) five more than m

"m in addition to 5"= m+5

For the first 3 years of a horse's life, the weight, w (in kilograms), of the horse approximately fits the formula w(t)=30+170t, where t is the age of the horse in years. Which of the following is the most accurate interpretation of the slope of the line represented by this formula? A. The slope is 170. This means that the horse gains an average of 170 kilograms per year for the first 3 years of its life.
B. The slope is 30. This means that the horse gains a total of 30 kilograms in the first 3 years of its life.
C. The slope is 30. This means the horse gains on average 30 kilograms per use for the first 3years of its life.
D. The slope is 170. This means that the horse gains a total of 170 kilograms in the first 3 years of its life.

Answers

Answer:

Option A. The slope is 170. This means that the horse gains an average of 170 kilograms per year for the first 3 years of its life

Step-by-step explanation:

Let

t ----> the number of years

w ---> is the weight in kilograms of the horse

we know that

The equation of a line in slope intercept form is equal to

$y=mx+b$

where

m is the slope or unit rate of the linear equation

b is the y-intercept or initial value

In this problem we have

$w(t)=30+170t$

where

The slope or unit rate is equal to

$m=170\ (kg)/(year)$ ---> (for the first 3 years of a horse's life)

The y-intercept is equal to

$b=30\ kg$ ---> value of w when the value of t is equal to zero

therefore

The slope is 170. This means that the horse gains an average of 170 kilograms per year for the first 3 years of its life

Which lines or segments are parallel? Justify your answer

Answers

Answer:

CH, AR are parallel.

What is 10/25 simplified

Answers

$(10)/(25)= (10/5)/(25/5)=\boxed { (2)/(5) }$

10 and 25 both have 5 in common so you divide the numerator and denominator by 5 to get 2/5, which cannot be simplified any further because they are both prime numbers

2x-3y=-143x-2y=-6
if (x,y) is a solution to the system of equations above, what is the value of x-y?
A)-20
B)-8
C)-4
D)8
can you show your work please

Answers

Answer:

Step-by-step explanation:

The given system of equations :

$2x-3y=-14.............................(1)\n3x-2y=-6.........................(2)$

Multiply equation (1) with 3 and equation (2) with 2 , we get

$6x-9y=-42.............................(3)\n6x-4y=-12.........................(4)$

Now subtract equation (4) from equation (3), we get

$5y=30\n\n\Rightarrow\ y=6$

Substitute the value of y in equation (1), we get

$2x-3(6)=-14\n\n\Rightarrow\ 2x=-14+18\n\n\Rightarrwo\ 2x=4\n\n\Rightarrow\ x=2$

Hence, the solution of the system : (x,y)=(2,6)

Now, consider $x-y$ and substitute the value of x and y , we get

$2-6=-4$

The solution to the equation is x - y = -4

Given data ,

To solve the system of equations, we can use the method of substitution or elimination. Let's use the method of elimination:

Multiply the first equation by 3 and the second equation by 2 to make the coefficients of x in both equations equal:

(3)(2x-3y) = (3)(-14)

(2)(3x-2y) = (2)(-6)

Simplifying these equations gives:

6x-9y = -42

6x-4y = -12

Now, subtract the second equation from the first equation:

(6x-9y) - (6x-4y) = (-42) - (-12)

-5y = -30

Divide both sides by -5:

y = 6

Substitute this value of y back into one of the original equations, let's use the first equation:

2x - 3(6) = -14

2x - 18 = -14

2x = 4

x = 2

Now , the value of x - y is given by

A = x - y

A = 2 - 6

A = -4

Hence , the equation is solved

To learn more about equations click :

brainly.com/question/19297665

#SPJ6