Simply the product.
(2y – 5)(3y + 1)
A. 6y2 + 13y - 5
B. 6y2 – 13y - 5
C. 6y2 + 17y + 5
D. 6y2 – 13y + 5

Given:

w varies jointly as x and y.

w=10 when x=2 and y=1.

To find:

The value of w when x=4 and y=2​.

Solution:

w varies jointly as x and y.

[tex]w\propto xy[/tex]

[tex]w=kxy[/tex]              ...(i)

Where, k is the constant of proportionality.

w=10 when x=2 and y=1.

[tex]10=k(2)(1)[/tex]

[tex]10=2k[/tex]

[tex]\dfrac{10}{2}=k[/tex]

[tex]5=k[/tex]

The value of k is 5.

Putting k=5 in (i), we get

[tex]w=5xy[/tex]

To find the value of w when x=4 and y=2​. Put x=4 and y=2.

[tex]w=5(4)(2)[/tex]

[tex]w=40[/tex]

Therefore, the value of w is 40 when x=4 and y=2​.

Answer:

Step-by-step explanation:

I dont see anything. You need to click link and attach a picture or the image to the question

Answer:

You need to add the picture so we can answer

Step-by-step explanation:

Answer:

(-2, 3)

Step-by-step explanation:

The solution to a system of equations is the value (or values) of x and y that satisfy both equations. we can find the value of x by setting the right sides of each of our equations equal to each other and solving:

[tex]4x+11=-2x-1\\6x=-12\\x=-2[/tex]

From here, we can simply substitute -2 for x in either of the equations to calculate y. I'll choose the bottom one:

[tex]y=-2(-2)-1\\y=4-1\\y=3[/tex]

So our solution is (-2, 3).

The awnser is A!! Because the graph describes as so.

Answer:

0.02

Step-by-step explanation:

High schools A :

Percentage of participants in on the school athletic team = 20%

Pa = 20% = 0.2

High school B:

Percentage of participants in on the school athletic team = 18%

Pa = 18% = 0.18

The mean of sampling distributon is :

Pa - Pb

0.2 - 0.18

Hence, Mean of sampling distribution is 0.02

Answer:

d

Step-by-step explanation:

Answer:

d

Step-by-step explanation:

Answer:

i think megan

Step-by-step explanation:

Answer:

Im pretty sure Nora has a better ratio of candy

Answer: get the 2 perfums in the size 50ml

Step-by-step explanation:

80ml is 55 pound

50 ml is 45 pound

2nd is half of 45 pound which is 22.5

the 2 perfum in the size 50 ml with the special price is: 45 + 22.5 = 67.5 now per ml is 0.675 pound per ml i found the price per pound by dividing the ml by the price

for the 80ml the price per ml is 0.6875

Answer:

PR = 10

Step-by-step explanation:

Pythagoras

hypotenus ² = base² + attitude ²

substitution ; PR² = 6²+8²

PR² = 100

PR = √100

So, PR = 10

hope it helps you ☺️

Answer:

A

Step-by-step explanation:

Distance between 2 points

[tex] = \sqrt{(x1 - x2)^{2} + (y1 - y2)^{2} } [/tex]

☆ (x₁, y₁) is the first coordinate while (x₂, y₂) I'd the second coordinate.

Length of RS

[tex] = \sqrt{ {[ - 1 -( - 4)] }^{2} + (9 - 1)^{2} } \\ = \sqrt{( - 1 + 4)^{2} + 8^{2} } \\ = \sqrt{ {3}^{2} + 64 } \\ = \sqrt{73} \\ = 8.54 \: (3 \: s.f.)[/tex]

Thus, RS is about 8.5 units.

Answer:

I believe its A. 8.5

Step-by-step explanation:

Answer:

random answer s are z best

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Work Shown:

n = number of novels

(32 ebooks)/(n novels) = 4/5

32/n = 4/5

32*5 = n*4 ............ cross multiply

160 = 4n

4n = 160

n = 160/4 .............. dividing both sides by 4

n = 40

There are 40 novels.

Answer:

x = 63

Step-by-step explanation:

Simplifying

x + -18 = 45

Reorder the terms:

-18 + x = 45

Solving

-18 + x = 45

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '18' to each side of the equation.

-18 + 18 + x = 45 + 18

Combine like terms: -18 + 18 = 0

0 + x = 45 + 18

x = 45 + 18

Combine like terms: 45 + 18 = 63

x = 63

Simplifying

x = 63

Answer:

its the last choice

Step-by-step explanation:

you can't find the exact angle with the given info so option 1 is automatic out, m<1 is also clearly an obtuse angle so it will be larger then 90° so option 2 is out, and like I said before m<1 has to be larger then 90° so its not option 3 leaving only option 4

Answer:

X>-5

Step-by-step explanation:

Answer:

2

Step-by-step explanation:

if we multiply the first equation by neg 2, the 4x's cancel out.

The method that should be selected is

2. Multiply the first equation by -2 and add the second equation.

In the elimination method, we can either add or subtract the equations to get an equation in one variable. At the time When the coefficients of one variable are opposites, so we can add the equations to eliminate a variable and when the coefficients of one variable are equal we can subtract the equations to eliminate a variable.

Learn more about an equation here: https://brainly.com/question/17599700

Answer:

no solution

Step-by-step explanation:

15(2x+2)=10(3x+4)  Distribute.

30x+30=30x+40     Subtract 30x from both sides.

-30x       -30x

30=40

30 does not equal 40, so there is no solution.

Hope this helps!! Have a great day C:

Answer in interval notation is  (-3, 1)

This is the same as saying -3 < x < 1

=====================================================

Explanation:

Since y = f(x), this means we're looking for points on the red curve such that they have a negative y coordinate. Visually, we're looking for points that are below the horizontal x axis.

These points are shown in the diagram below. I've marked the section we're after in blue. This blue section spans from x = -3 to x = 1. We exclude both endpoints because each x value leads to f(x) = 0, but we want f(x) values smaller than zero.

860(1-(8)/(100))^(19) solve that

Answer:

2 grams

Step-by-step explanation:

Answer:

(2,2)

Step-by-step explanation:

first take x-y=0 and multiply it by -5 you will then get this

-5x+5y=0

5x-2y=6

add those together

3y=6

divide by 3

y=2

now plug 2 in for y

x-2=0

add 2 to both sides

x=2

Answer:

14

Step-by-step explanation:

A trapezoid is a quadrilateral (has four sides and four angles) with a pair of opposite parallel sides. The pair of opposite parallel side is known as the base.

An isosceles trapezoid is a trapezoid with equal legs. The diagonals are also equal and both the upper and lower base angles are congruent.

From the question:

KV = IE = 2x + 6 (diagonals of a trapezoid are congruent)

From line segment addition postulate:

KV = KN + NV

substituting:

2x + 6 = 10 + x

2x + 6 - x = 10

x + 6 = 10

x = 10 - 6

x = 4

KV = 2x + 6

substituting x = 4:

KV = 2(4) + 6

KV = 14

Answer:

3x^4-13x^3-x^2-11x+6

Step-by-step explanation:

Checked this on a website for you btw!

Answer:

3x^4-13x^3-x^2-11x+6

Step-by-step explanation:

Answer: 1246 for the first and 1400 for the second

Step-by-step explanation:

Answer:

i think you had it on the point

Step-by-step explanation:

Answer:

5 times x minus 8 minus 7

Step-by-step explanation:

whenever you see an x right next to a number, it means that it's being multiplied for that number. For example: 2x mean 2 times x

This symbol - is a minus symbol. So when it's in front of a number, you say "minus" and then the number. For example: 4 - 3 means, Four minus three.

Answer:

0.51

Step-by-step explanation:

Answer:

5x-5 = 5(x−1)

X-23 = =x−23

Step-by-step explanation: hope this help

Answer:

5 pieces

Step-by-step explanation: