Can someone please solve this using quadratic formula

2x^2 -7x -15=0

Answer:

m = 1/2

Step-by-step explanation:

The given equation of line is :

2x – 4y = 9 ..(1)

We need to find the slope of the line. The general equation of a line is given by :

y = mx + c ..(2)

Where

m is the slope of line

Equation (1) can be rearranged as follow :

-4y = 9-2x

4y = -9+2x

or

4y = 2x-9

Divide both sides by 4.

[tex]\dfrac{4y}{4} = \dfrac{2x}{4}-\dfrac{9}{4}\\\\y=\dfrac{1}{2}x+(\dfrac{-9}{4})[/tex] ..(3)

Now comparing equation (2) and (3) we get :

[tex]m=\dfrac{1}{2}[/tex]

So, the slope of the line is 1/2.

Answer:

option number c....is correct

Answer:

b

Step-by-step explanation:

The variability of the proportion of blemishes for Mary's sample will be greater than the variability of Pat's.

The expressions  3x² - 7y, 2 - 8y, 4x² - 9  are polynomilas.

A polynomial is an algebraic expression of degree n where n belongs to whole numbers.

A polynomial of degree n can be written as a₀xⁿ + a₁xⁿ⁻¹ + a₂xⁿ⁻² + ... + aₙ.

Given, are 4 polynomials 3x² - 7y it is a polynomial because it has powers that are in whole numbers and it is of degree 2 in variables x and y.

2 - 8y is also a polynomial as the degree of y is 1 and it is a whole number.

3x⁻² + y is not a polynomial as the degree of x is - 2 and it is not a whole number.

4x² - 9 is also a polynomial as it has a degree of 2 a whole number.

learn more about polynomials here :

https://brainly.com/question/20121808

#SPJ2

Answer:

Irrational numbers: Real numbers that are not rational. Purely imaginary numbers: Numbers that equal the product of a real number and the square root of −1. The number 0 is both real and purely imaginary. ): Includes real numbers, imaginary numbers, and sums and differences of real and imaginary numbers.

Answer: well it  natural because it is exist

Step-by-step explanation:

Answer:

-½x - 6

Step-by-step explanation:

Find the gradient first then solve for equation with unknown values of x and y

Step-by-step explanation:

I dont think those are wuestiojs to be answered. Probably questions on how the equation is solved

Answer:

D) 2/3

Step-by-step explanation:

Constant of proportionality formula:

k = y/x

8/12 = 2/3

10/15 = 2/3

12/18 = 2/3

14/21 = 2/3

Answer:

Yes,they are in proportion

Step-by-step explanation:

We are told that 150 litres of water flows through a pipe in 6 minutes.

Thus means that the rate of flow = 150/6 = 25 litres/minutes

Now, we are also told that through the same pipe, 200 litres of water flows in 8 minutes. This means that the rate of flow = 200/8 = 25 litres/minutes

Now, the rate of flow is both instances is the same. Thus, we can say they are in proportion because;

Proportion of quantity in both instances = 200/150 = 4/3.

while that of time = 8/6 = 4/3

They have the same proportion

Sure I'll help you

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hope that answers your question! :D

Answer:

$200 each month

Step-by-step explanation:

1,500-300 = 1200

1200/6 = 200

Answer:

9/-1

Step-by-step explanation:

By using the formula y2-y1/x2-x1

Answer:

First one is d and second one is c

Step-by-step explanation:

(6x+7)(x-8)

(6x)(x) = 6x^2

(6x)(-8) = -48

(7)(x) = 7x

(7)(-8) = -56

Add all like terms together and you get choice d.

(w+3)(w-3)

(w)(w) = w^2

(w)(-3) = -3w

(3)(w) = 3w

(3)(-3) = -9

Add all like terms together and you get choice c

Answer:

(6x+7)(x-8)=6x^2-41x-56

Step-by-step explanation:

(6x+7)(x-8)

Apply FOIL method: (a+b)(c+d)=ac+ad+bc+bd= a=6x, b=7 c=x, d=-8=6xx+6x(-8)+7x+7(-8)

Apply minus & plus rules: =6xx-6(8x+7x-7)8

simplify: 6xx-6(8x+7x-7)8=6x^2-41x-56

Answer:

the expression would be: 18x-12y

Step-by-step explanation:

Answer:

A,C, F

Step-by-step explanation:

y> 7 so,

eliminating B,D and E

now, for A, 2×1 < 9

for C, 2×-1<10

for F, 2× 17< 59

Answer:

2 3 4 parts because it is split into 4 parts you know your denominator. Will be 4. Now let's look at the blue number line this number line is split into.

Step-by-step explanation:

i hope mkatulong.

Answer:

    dont click that link report it

Step-by-step explanation:

Answer:

15 miles

Step-by-step explanation:

If there are 2.5 inches and 1 inch is 6 miles, then just multiply 6 by 2.5 to get 15

6*2.5=15

Answer:

Yes

Step-by-step explanation:

5,0 is a solution to the graphed inequality as it lies on the edge of the shaded area. Because the line is solid rather than dotted/dashed this means that all answers on the line will be included in the solutions. This is a graph for an inequality with one of these symbols ≤ ≥.

Answer: 100

Step-by-step explanation:

Well 15 + 5 = 20.

Then 20 x 5 = 100.

So 100 is the answer.

5(3+1)

Factor 5 out of 15x is 5

(3x)+5(−1)

Factor 5 out of 5 (3x)+5(-1).5(3x−1)

Answer:

[tex]0.0005[/tex] [tex]= 5 * 10^{-4[/tex]

[tex]7.1034 * 10^3 = 7103.4[/tex]

Step-by-step explanation:

Solving (a):

[tex]0.0005[/tex]

Standard form is represented as:

[tex]a * 10^n[/tex] where [tex]1 \le a \le 10[/tex]

Move the decimal point to 5 and count the number of times the decimal point is moved forward (forward represents negative).

So:

[tex]a = 5[/tex]

[tex]n = -4[/tex]

Hence:

[tex]0.0005[/tex] [tex]= 5 * 10^{-4[/tex]

Solving (b):

[tex]7.1034 * 10^3[/tex]

Express [tex]10^3[/tex] as [tex]1000[/tex]

This gives:

[tex]7.1034 * 10^3 = 7.1034 * 1000[/tex]

[tex]7.1034 * 10^3 = 7103.4[/tex]

Rate of change is 2.

Y = mx + b (m is rate of change)