7/8th grade math please help!

7/8th Grade Math Please Help!

Answers

Answer 1

Answer:

H) 320 square units for the surface area

Step-by-step explanation:

20(5.2+5.25+4.5) + 2(1/2(4*5.25)) = 320


Related Questions

I need help lol............

Answers

Answer:

y=4x-1

Step-by-step explanation:

I plugged the table into Desmos and I determined the slope and intercept from that.

the equation to find the slope is
(y2-y2)/(x2-x1)

plug in two points from the table:
(7- -5)/(2- -1) = 12/3 = 4

the slope is 4

plug in one of the points and the slope into point slope form:
y+5 = 4 (x+1)

solve to find slope intercept form:
y+5 = 4x + 4
y = 4x - 1

answer: y = 4x - 1

Answer this Please For Top Brainly

Answers

Answer:

300g for 7.49 has the best value

Step-by-step explanation:

200g for 5.69

200/5.69

35.15g for 1

300g for 7.49

300/7.49

40.05g for 1

0.9(x-20)=830
What does x equal?

Answers

Answer:

x = [tex]942\frac{2}{9}[/tex]

Step-by-step explanation:

0.9 ( x - 20) = 830

0.9x - 18 = 830

0.9x = 848

9x = 8480

x = [tex]942\frac{2}{9}[/tex]

responda as expressões 2x+3x+5x:​

Answers

The answer for 2x+3x+5x is 10x

Answer:

[tex]\tt{}10x[/tex]

Step-by-step explanation:

[tex]\tt{}2x + 3x + 5x[/tex]

[tex]\tt{}(2 + 3 + 5)x[/tex]

[tex]\tt{}10x[/tex]

i really need help please anyone

Answers

-3/4 is the slope of the line

What is a 18% tip on a $40.00 haircut

Answers

Answer:

$7.2

Step-by-step explanation:

Answer:

$7.20

Step-by-step explanation:

HELP WHAT IS THE SLOPE!!!!!!

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Answer:

4/3

Step-by-step explanation:

rise over run

gradient=80/60=4/3

answer this plz maths question ​

Answers

Answer:

Step-by-step explanation:

[tex]\frac{3x + 5}{4x +2}=\frac{3x+4}{4x + 7}[/tex]

Cross multiply,

(3x+ 5 ) (4x + 7)=(3x + 4)*(4x + 2)

3x*4x  + 3x *7 + 5*4x  + 5*7  = 3x*4x  + 3x*2  +4*4x + 4*2

12x² + 21x + 20x + 35 = 12x² + 6x + 16x + 8   {Combine like terms}

12x² + 41x + 35   = 12x² + 22x + 8

12x² + 41x +35 - 12x² - 22x  = 8

12x² - 12x² + 41x - 22x + 35  = 8

0 + 19x  + 35 = 8

              19x = 8 - 35

             19x  = -27

x = -27/19

I need help pleaseseee

Answers

Answer:

Area of figure:  (4y - 7)(x + 6y + 1)

Step-by-step explanation:

The height of the figure is 4y - 7 and the length is x +  6y + 1.

The area of the figure is the product of height and length, or:

(4y - 7)(x + 6y + 1)

what is the value of x?

Answers

Answer:

68

Step-by-step explanation:

c=√a^2+b^2

√ 60^2 + 32^2 =68

We will use the Pythagorean Theorem

[tex]x {}^{2} = {32}^{2} + {60}^{2} \\ {x}^{2} = 1024 + 3600 \\ x {}^{2} = 4624 \\ x = \sqrt{4624} \\ x = 68[/tex]

The green triangle is a dilation of the red triangle with a scale factor of s=13 and the center of dilation is at the point (4,2)

What are the coordinates of Point C'? C'(___,____)

What are the coordinates of Point A? A(____,_____)

Answers

Answers:

C ' (2, 5)A (16, 8)

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

Explanation:

I'm assuming you mean to say "scale factor of s = 1/3" since the green triangle is smaller than the red triangle.

Let's start at the point (4,2). This is the center of dilation. This fixed point does not move or change as you apply any dilation (as long as you keep this as the center of course). Every other point will move. For instance, the point (10,14) moves to (6,6) after applying the dilation.

----------------------

The x coordinate of the center point (4,2) is x = 4.

The x coordinate of the point (10,14) is x = 10.

Going from (4,2) to (10,14) will have us move a horizontal distance of 10-4 = 6 units.

Take 1/3 of this horizontal distance and we get (1/3)*6 = 2. This means that if we started at the center point (4,2) and move 2 units to the right, we will have the x coordinate to be x = 4+2 = 6, which matches up with the x coordinate of the point (6,6)

-------------------------

We'll do the same sort of thing with the y coordinates

The point (4,2) has the y coordinate y = 2

The point (10,14) has the y coordinate y = 14

The vertical distance between those points is 14-2 = 12 units

One third of this is (1/3)*12 = 4

If we started at (4,2) and moved up 4 units, then the y coordinate goes from y = 2 to y = 2+4 = 6. This also matches (6,6)

----------------------------

Hopefully by now you have a sense of how this all works. Let's use these tricks to find the location of point A.

The horizontal distance from (4,2) to (8,4) is 8-4 = 4 units. This triples to 4*3 = 12 units. We triple here because we're going in reverse of the process described in the previous two sections. If (8,4) and A swapped places, then we would take one third instead.

We'll use that 12 to count out 12 horizontal spaces from (4,2) to get to (16,2). I added 12 to the x coordinate of (4,2).

Repeat the process for the y values. The vertical distance from (4,2) to (8,4) is 2 units, which triples to 6. Add 6 onto the y coordinate of (16,2) and we arrive at (16, 8) which is the location of point A.

--------------------------------

Now let's find the location of point C'

The horizontal distance from (-2,11) to (4,2) is 6 units because |-2-4| = 6. Multiply this by 1/3 and we get (1/3)*6 = 2

To get to the location point C', we need to start at (4,2) and move to the left 2 units. That means (4,2) will move to (2,2) as a temporary location.

We apply the same idea for the y coordinates. The vertical distance from (4,2) to (-2,11) is 9 units. This leads to (1/3)*9 = 3 units being the vertical distance from (4,2) to the location of C'. We'll add 3 to the y coordinate of (2,2) to arrive at (2,5) which is the location of C'.

for what values of x is the expression below defined? x+4

Answers

Answer:

D

Step-by-step explanation:

It’s D
I got it right

what is 260 add 212 multiplied by 234 minus 1000

Answers

Answer:

its 48,868

Step-by-step explanation:

Answer:

48 868

Step-by-step explanation:

260+212×233-1000

260+(212×233)-1000

260+49 608-1000

49 868 - 1000

=48 868

Find the area of the shaded region formed by circle that touches the edges of a rectangle.

Answers

Answer:

[tex] 266.14 \: {cm}^{2} [/tex]

Step-by-step explanation:

In case of rectangle:

Length l = 30 cm

Width w = 14 cm

Since, circle touches the edges (lengths) of the rectangle.

Therefore,

Diameter of circle = 14 cm

So, radius r = 14/2 = 7 cm

Area of the shaded region = Area of rectangle - Area of circle

[tex] = lw - \pi {r}^{2} \\ \\ = 30 \times 14 - 3.14 {(7)}^{2} \\ \\ = 420 - 3.14 \times 49 \\ \\ = 420 - 153.86 \\ \\ = 266.14 \: {cm}^{2} [/tex]

I need help with my geometry!

Answers

Answer:

142 degrees

Step-by-step explanation:

180-38

Answer:

[tex]142[/tex]°

Write the expression:

The quotient of the sum 3y and 5, and y squared.

Answers

Answer:

(3y + 5) / (y^2)

Step-by-step explanation:

Sorry it's not actually in fraction format. That little button thing is having troubles atm on my end. Hope this is okay

y+5=2(x+1)
Only (5,10)
Only (-1,-5)
Both
Neither

Answers

Answer: only (-1, -5)

Step-by-step explanation:

If x= -1 and y= -5

(-5)+5= 2((-1)+1)= 0

y+5 = 2(x+1)

y+5 = 2x+2

y-2x = 2-5

y-2x = -3

2x-y = 3

2(5)-(10) = 3

10-10 = 3
0 = 3
option A is incorrect

2(-1) - (-5) = 3

-2 + 5 = 3

3 = 3

Option B is correct

2 cups of sugar are needed for each gallon of lemonade. How many cups of sdgar would be needed
for 9 gallons of lemonade.

Answers

Answer:

18 gallons

Step-by-step explanation:

2 cups of sugar times 9 gallons of lemonade is 18

14 less than 6 multiplied by a number

Answers

Answer:

6n - 14

Step-by-step explanation:

6n - 14?

6 times a number (6n) minus 14 (-14)

put together = 6n - 14

14 - 6 = 8 then 8 times 5 is 40, 40 is the answer :)

Please awnser this and give me the right awnser

Answers

Variable is b
Coefficient is 8
Constant is 3.2

Hope this helps

Can I have brainliest?!?

Please help if you want BRIANLIST PLEASE!!!

Answers

Answer:

there are 4 times larger

Step-by-step explanation: 11 x 4 = 44 so its 4 times larger

i think it is e but I am not sure. If someone knows the answer, please reply

Answers

The answer is true you’re welcome

Answer: You are correct it is E

Step-by-step explanation:

Saw the question answered on brainly so its correct

Which of the following are solutions to the equation below?
Check all that apply
x2 + 4x + 4 = 12

Answers

Answer:

         C.  2√3 - 2

Step-by-step explanation:

[tex]x^2 + 4x + 4 = 12\\\\x^2+2\cdot x\cdot2+2^2=12\\\\(x+2)^2=12\\\\x+2=-\sqrt{12}\quad\vee\quad x+2=\sqrt{12}\\\\x=-2\sqrt{3}-2\quad\vee\quad x=2\sqrt3-2[/tex]

Polygons ! ( picture included)

Answers

Answer:

B

Step-by-step explanation:

2x+x=180

3x=180

x=60

2x=120

so B

hope that helps if it does please mark mine as brainliest.

Answer:

The answer would be B

Step-by-step explanation:

Hope this helps

What is the area of these shapes?

Answers

Answer: 1 number the area is 7200

Step-by-step explanation:

a land area was divided among three heirs in the ratio 5:2:4 . if the largest share was 20 hectares of the land .what is the total area of the land

with solution please and what type of proportion thank you very much

Answers

Answer:

44 hectares

Step-by-step explanation:

The largest number in the ratio is 5 and corresponds to the largest share.

The largest share is 20 hectares.

20/5 = 4

Multiply each number in the ratio by 4 to get the number of hectares of that portion.

5 * 4 = 20

2 * 4 = 8

4 * 4 = 16

20 + 8 + 16 = 44

Answer: 44 hectares

If you need to show a proportion, then do it this way.

The ratio is 5:2:4

Add 5 + 2 + 4 = 11

The ratio of the largest portion to the total area is

5/11

The largest portion is 20 hectares, and the total area is unknown, so we use x. The ratio of the largest portion to the total area is

20/x

We set the two ratios equal creating a proportion.

5/11 = 20/x

Cross multiply

5x = 11 * 20

Divide both sides by 5

x = 11 * 4

x = 44

Answer: 44 hectares

Here is another question. It wants me to solve it

Answers

Answer:

[tex]x>-11[/tex]

Step-by-step explanation:

[tex]10+2x>-12[/tex]

Subtract both sides by 10

[tex]10+2x-10>-12-10\\2x>-22[/tex]

Divide both sides by 2

[tex]\frac{2x}{2}>\frac{-22}{2} \\x>-11[/tex]

I hope this helps!

Answer:

x > -11

Step-by-step explanation:

At Ned's newsstand, 4 magazines cost $24.00 how many magazines could you buy with $60.00 help

Answers

11. But probably if their is tax like 10 lol. But 11

You can buy 10 magazines in $60.

What is unit rate?

A unit rate means a rate for one of something.

Given that, the cost of 4 magazines is $24.00

For 4 magazine → $24

So, for 1 magazine = 24/4 = $6

So, in $60,

60/6 = 10

Hence, you buy 10 magazines in $60.

For more references on unit rate, click;

https://brainly.com/question/11258929

#SPJ2

10. What is the exponent in this equation: 5*(x-2) = 125 *
O
Х
Ox-2
O 5
O 125

Answers

Answer:

x-2

Step-by-step explanation:

A diagram of a rectangular pool with the diagonal of 50 meters is shown below. Connected to the pool is a square shaped kid’s pool.
What is the area of the kid’s pool in the diagram?

Answers

The pool is 40 since half of the other rectangle is 50 which the 2 halfs equal 100 and we already know the top side measurement which is 40 and 2 sides of 40 equal 80 and there’s 20 left so this concludes that’s the sides are 10 and square sides are congruent to each other which concludes that’s the AREA is 40

Answer:

The area of the kids' pool is 900 square meters.

Step-by-step explanation:

The area of the kids' pool is 900 square meters. Only one side length needed to be found because it is a square (all sides are the same). The side length that can be easily found is the one that is shared with the rectangular pool. Using the Pythagorean theorem (a²+b²=c²), that missing side can be calculated. 40² is 1600 and 50² is 2500. To get the missing side ("b"), "c" must be subtracted by "a". 2500-1600=900. Even though that is the answer, the work is not done. The square root of 900 is 30. In the end, the missing side ("b") is 30 square meters. To find the area, you have to multiply 30 by 30. 30 times 30 is 900. So the kids' pool is 900 square meters.

Hope this helps! Please vote me as Brainliest. Let me know if you need more of an explanation. Hope this helps everyone. Good luck with whatever you are doing! Have an amazing day!

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