This is hard for me can anyone help me? 9

Answer:

(7a-3a)+(2a-a)=16

4a+a or 1a =16

5a=16

5a/5=16/5

a =16/5 or a=3.2

Step-by-step explanation:

solving like terms or substract are same

you only have to find value of uknown value which was "a" question

Answer:

7 times 5 is 35 so I think that's the answer

Answer:

Step-by-step explanation: 35- Because 7÷35

Answer:

b x 15

Step-by-step explanation:

b x 15

b = total number of teams

15 is how many players on each team

Answer:

25

Step-by-step explanation:

Answer:

25 books

Step-by-step explanation:

So, we know that Kelly read 19 books.

Elyse read 6 more books than 19.

Therefore, to find the amount of books Elyse read, add 6 to 19:

[tex]6+19[/tex]

Add:

[tex]=25[/tex]

So, Elyse read 25 books.

Answer:   [tex]\dfrac{\sqrt2}{2}[/tex]

Step-by-step explanation:

sin 75 = sin(30 + 45) = sin30 · cos45  + cos30 · sin45

                                 [tex]=\dfrac{1}{2}\cdot \dfrac{\sqrt2}{2}+\dfrac{\sqrt3}{2}\cdot\dfrac{\sqrt2}{2}\qquad =\dfrac{\sqrt2+\sqrt6}{4}[/tex]

sin 15 = sin(45 - 30) = sin45 · cos30  - cos45 · sin30

                                  [tex]=\dfrac{\sqrt2}{2}\cdot \dfrac{\sqrt3}{2}-\dfrac{\sqrt2}{2}\cdot\dfrac{1}{2}\qquad =\dfrac{\sqrt6-\sqrt2}{4}[/tex]

    sin75 - sin15

[tex]=\dfrac{\sqrt2+\sqrt6}{4}-\dfrac{\sqrt6-\sqrt2}{4}[/tex]    

[tex]=\dfrac{\sqrt2+\sqrt6-\sqrt6+\sqrt2}{4}\\\\=\dfrac{2\sqrt2}{4}\\\\=\dfrac{\sqrt2}{2}[/tex]

Answer:

Below.

Step-by-step explanation:

2x  + 2 - 2 = 10 - 2    Subtraction property of equality.

Answer:

Step-by-step explanation:

Multiplication

Ratio of Tables to garbage = 8:3

Small camp ground:

40 picnic tables and let x be the number of garbage cans

[tex]\frac{8}{3}=\frac{40}{x}\\\\\frac{8*5}{3*5}=\frac{40}{x}\\\\\frac{40}{15}=\frac{40}{x}\\\\[/tex]

x = 15

Small campground with 40 picnic table needs 15 garbage cans

Large picnic ground:

120 picnic tables and let y be the number of garbage cans

[tex]\frac{8}{3}=\frac{120}{y}\\\\\frac{8*15}{3*15}=\frac{120}{y}\\\\\frac{120}{45}=\frac{120}{y}[/tex]

y= 45

Big campground with 120 picnic table needs 45 garbage cans

Answer:

Options (3) and (6)

Step-by-step explanation:

"A straight line is a set of all points between two points and extending beyond these points."

Therefore, from the given diagram,

Arrows connecting set of two points B and C and D and E will be straight lines.

Geometrically we denote them with an arrow over the line.

[tex]\overleftrightarrow {BC}[/tex] and [tex]\overleftrightarrow {DE}[/tex]

Therefore, Options (3) and (6) will be the answer.

Answer:

60°, 100° and 120°

Step-by-step explanation:

The angles x, y and z all lie on straight lines adjacent to other angles, thus

x = 180° - 120° = 60°

y = 180° - 80° = 100°

z = 180° - 60° = 120°

Answer:     [tex]\dfrac{x^2}{64}+\dfrac{y^2}{16}=1[/tex]

Step-by-step explanation:

The standard form for an ellipse is:   [tex]\dfrac{(x-h)^2}{a^2}+\dfrac{(y-k)^2}{b^2}=1[/tex]    where

Given: (h, k) = (0, 0)

a = 8 (distance on x-axis from origin to -8)

b = 4 (distance on y-axis from origin to 4)

Input h = 0, k = 0, a = 8, b = 4 into the standard form for an ellipse:

                                    [tex]\dfrac{(x-0)^2}{8^2}+\dfrac{(y-0)^2}{4^2}=1[/tex]

                                  [tex]=\dfrac{x^2}{64}+\dfrac{y^2}{16}=1[/tex]

Answer:

-14w + 4

Step-by-step explanation:

-7w - 5 - 7w + 9

-7w - 7w + 4

-14w + 4

Answer:

48

Step-by-step explanation:

48.1

for decimals:

0-4 keep the number the same

5-9 rounds up

Answer:

14

Step-by-step explanation:

To evaluate, substitute x = 5 into the expression, that is

5² - 3(5) + 4 = 25 - 15 + 4 = 14

Answer:

The answer is

Step-by-step explanation:

The distance between two points can be found by using the formula

where

(x1 , y1) and (x2 , y2) are the points

From the question the points are

(3,5)and (7,-3)

The distance between them is

We have the final answer as

Hope this helps you

Step-by-step explanation:

√(7-3)^2+(-8)^2

√16+64

√80

8.94

Answer:

Step-by-step explanation:

Answer& Step-by-step explanation:

To multiply powers of the same base, add their exponents.

5d³ / 3f

Answer: n = 5a-6 / a-b

Step-by-step explanation: Move all of your terms to the left side of the equation and then set the equal to 0. Then, set each of your factors equal to 0, as well.

I hope this helps you out.

Answer:

36v² - 60xv + 25x²

Step-by-step explanation:

Step 1: Write out expression

(6v - 5x)²

Step 2: Expand

(6v - 5x)(6v - 5x)

Step 3: FOIL

36v² - 30xv - 30xv + 25x²

Step 4: Combine like terms

36v² - 60xv + 25x²

Answer: 3/8

Step-by-step explanation: 1/4 x 2 = 2/8 + 3/8 = 5/8 pizza gone. 1 - 5/8 = 3/8

ANSWER:  3/8

let's assume that Derrick is a nice guy and his pizza is an integer of 1

first he gave his friend a quarter so we subtract [tex]\frac{1}{4}[/tex] from 1

[tex]1-\frac{1}{4}[/tex]

now we rewrite 1 as a fraction with a denominator of 4 so that we're able to subtract: [tex]\frac{4}{4}-\frac{1}{4} =\frac{3}{4}[/tex]

now that Derrick still has [tex]\frac{3}{4}[/tex] of his pizza he's gonna give [tex]\frac{3}{8}[/tex] to his sister as well

meaning that we subtract again: [tex]\frac{3}{4} -\frac{3}{8}[/tex]

in order to be able to subtract different fractions, they got to have the same denominator, so we're going to multiply [tex]\frac{3}{4}[/tex] both numerator and denominator by 2: [tex]\frac{2*3}{2*4} -\frac{3}{8} = \frac{6}{8} -\frac{3}{8} = \frac{3}{8}[/tex]

we can now conclude that Derrick is left with only [tex]\frac{3}{8}[/tex] of his pizza.

Answer:

The solution of the system of equation in coordinate form is (2, 0)

Step-by-step explanation:

The given equation are;

2·x - y = 4....................(1)

5·x + 2·y = 10..............(2)

Multiplying equation (1) by 2 and subtract it from equation (2) gives;

5·x + 2·y - 2 × (2·x - y) = 10 - 2×4

5·x - 4·x + 2·y - 2·y = 2

x = 2

From equation (1), we have 2·x - y = 4, when x = 2, we get;

2×2 - y = 4

y = 2×2 -4 = 0

y = 0

Therefore;

The solution of the system of equation in coordinate form is (2, 0).

Sorry didn't know how to write the answer so I just took a screen shot of my answer for you!

Answer:

x would be 58°

Step-by-step explanation:

Answer:

13.21

Step-by-step explanation:

Sin(32)=7/x

x=7/sin(32)= 13.21

━━━━━━━━━━━━━━━ ♡ ━━━━━━━━━━━━━━━  

Since Solise want to plant both trees and bushes in the same number of rows, you need to find the common factor.

Since the question is asking what the greatest number of rows she can plant, you have to find the greatest common factor.

The greatest common factor of 24 and 16 is 8.

You can plant 24 bushes in 8 rows (meaning you can divide it by 8), and 16 trees in 8 rows (meaning you can divide it by 8). Since the greatest number you can divide them both by is 8, the GCF of 24 and 16 is 8.

So the greatest number of rows Solise can plant is 8 rows.

━━━━━━━━━━━━━━━ ♡ ━━━━━━━━━━━━━━━  

Answer:

[tex]Slope\ of\ A'B'= 3[/tex]

Step-by-step explanation:

Given

[tex]Slope\ of\ AB= 3[/tex]

Required

Determine the slope of A'B'

Represent the coordinates of AB with (x,y), such that

[tex]AB = (x,y)[/tex]

Since A'B' is 3 * AB, we have

[tex]A'B' = 3 * AB[/tex]

Substitute (x,y) for AB

[tex]A'B' = 3 * (x,y)[/tex]

[tex]A'B' = (3x,3y)[/tex]

Since the slope of AB = 3, then the slope of A'B' is also equal to 3 because dilation through (0,0) does not have effect on the slope

Answer:

3, Does not Pass

Step-by-step explanation:

Good luck with edmentum everyone :D

Answer:

ΔADE is isosceles

Step-by-step explanation:

Δ ABC is isosceles

AB ≅ AC

∠B ≅ ∠C

If DE parallel to BC

AD ≅ AE

∠D ≅ ∠E

ΔADE is isosceles

The isosceles triangle is a polygon with three sides, two being equal and the other unequal.

The angles D and E will also be equal  and the A other different.

Answer:

The length of the trip is 1.5

Step-by-step explanation:

5÷100×30=1.5

Answer:

2,000

Step-by-step explanation:

I hope this helps!

Answer:

4 gallons of 15% ethanol

5 gallons of 78% ethanol

Step-by-step explanation:

Given that:

Two types of gases:

1st gas with 15% ethanol

2nd gas with 78% ethanol

The gases are to be mixed in such a way that the mixture of gases comes out to be with 50% ethanol with volume of 9 gallons.

Let amount of gas with 15% ethanol used = [tex]x[/tex] gallons

Now, we are given that total volume is 9 gallons, then

amount of gas with 78% ethanol used = 9 - [tex]x[/tex] gallons

As per the question statement:

[tex]x\times 15\% + (9-x)\times 78\%=9\times 50\%\\\Rightarrow x\times 15 + (9-x)\times 78=9\times 50\\\Rightarrow 9\times 78-9\times 50=63x\\\Rightarrow 9\times 28=63x\\\Rightarrow \bold{x = 4\ gallons}[/tex]

Therefore, the answers are:

4 gallons of 15% ethanol

9 - 4 = 5 gallons of 78% ethanol

The number of gallons required of both kind would be as follows:

4 gallons having 15% ethanol

5 gallons having 78% ethanol

Given that,

The 2 kinds of gases are:

One with 15% ethanol

Other with 78% ethanol

Given that,

The gases(ethanol and gasoline) are diluted in a such a manner that it involves a total of only 50% ethanol.

Number of gallons she wants to use = 9

This shows that only 50% of 9 gallons i.e. 4.5 gallons of ethanol can be used.

Assuming x being the gasoline's measure that is diluted with 15% ethanol.

Now,

The gasoline's measure that is diluted with 78% ethanol would be = 9 - x gallons

Therefore,

x × 15% + (9-x) × 78% = 4.5

On solving, we get

x = 4 gallons

Thus,

The measure of gallons having 15% ethanol = 4

The measure of gallons having 78% ethanol = (9 - x)

= (9 - 4)

= 5 gallons

Learn more about "Fuel" here:

brainly.com/question/6950761

Answer:−21x−8

Step-by-step explanation: All sides have the same measure in a square, therefore all sides are 3x-8. Area is equal to 3x-8 times 3x-8 which is −21x−8

If the side of the square is (3x - 8), the area of the square is 9x² -48x + 64

A square is a two-dimensional figure that has four sides and all four sides are equal.

The area of a square is given as side².

We have,

Square:

Side = (3x - 8)

The area of a square.

= Side²

= (3x - 8)²

Factorize using [(a + b)² = a² + 2ab + b²].

Now,

(3x - 8)²

= 9x² + 8² - 48x

= 9x² -48x + 64

Thus,

The area of the square is 9x² -48x + 64.

Learn more about squares here:

https://brainly.com/question/22964077

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