- 7th Grade work -

Pls just say if it's a, b, c, or d.

Answer:

16

Step-by-step explanation:

add

Answer:

1/4

Step-by-step explanation:

Using the Empirical Rule, it is found that the interval of hours that represents the lifespan of the middle 99.7% of light bulbs is (1390, 1810).

It states that, for a normally distributed random variable:

The middle 99.7% is within 3 standard deviations of the mean, hence:

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Answer:

c.

Step-by-step explanation:

from the expression (9 + 3i) - (-4 + i);

STEP 1: multiply (-4 + i) by the minus sign before it.

we have +4 - i as the result.

we are left now with:

9+3i+4-i.

STEP 2: grouping those with same values,

9+4+3i-i= 13+2i

9514 1404 393

Answer:

  C.  26

Step-by-step explanation:

The two marked angles are "vertical angles." They are congruent.

  x +20 = 3x +8 . . . . . congruent angles have the same measure

  12 = 2x . . . . . . . . . subtract x+8 from both sides

  6 = x . . . . . . . . . divide by 2

  ∠PTQ = (x+20)° = (6+20)° = 26°

Answer:

Solutions given:

we have

<RTS=PTQ[vertically opposite angle are equal]

so

3x+8=x+20°

3x-x=20-8

2x=12

x=12/2=6

x=6

m<PTQ=6+20=26°

option c.26.

Step-by-step explanation:

Answer:

The Answer Is That "The Greatest Common Factor Of The Terms Is 1."

Step-by-step explanation:

Took The Test.

The polynomial is factorized and greatest common factor of the terms is 1

Brackets should be expanded in the following ways to factorize an expression

For an expression of the form A = a ( b + c ) , the expanded version is given by A = ab + ac, i.e., multiply the term outside the bracket by everything inside the bracket

For an expression of the form A = ( a + b ) ( c + d ) , the expanded version is given by A = ac + ad + bc + bd, in other words everything in the first bracket should be multiplied by everything in the second.

Given data ,

Let the polynomial be represented as A

Now , the value of A is

A = 30x² + 40xy + 51y²    be equation (1)

Now , the expression can be factorized as

The factors of 30 = 1 , 2 , 3 , 5 , 6 , 15 and 30

The factors of 40 = 1 , 2 , 4 , 5 , 8 , 10 , 20 and 40

The factors of 51 = 1 , 17 , 51

Therefore , the greatest common factor is 1

Hence , the factorized form of the equation is A = 30x² + 40xy + 51y²  

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Answer:

What is the question to this?

Answer:

Between 20% and 80%,,,

Step-by-step explanation:

There is no way to really explain it.

Answer:

m=0.9

Step-by-step explanation:

An outdoor summer camp offers its campers 14 activities. Campers make a 3 schedule. So, 4.6 different schedules are possible.

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value.

An outdoor summer camp offers its campers 14 activities. Campers make a schedule for their morning, afternoon, and evening sessions.

The total number of activities = 14

The total number of schedules = 3

So, The possible different schedules will be

14 divided by 3 = 14/ 3

= 4.6

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Answer:

√65 feet

Step-by-step explanation:

Using the pathagoryoes theroem (the equation in your picture) we have

4²+7²=c²

simplify to

16+49=c²

65=c²

√65=c

"A processing machine crushes 3 1/4 kilograms of dried fruits in 3/4 minutes.

What is the rate, in kilograms per minute, at which the machine crushes dried fruits?"

All you're doing here is finding the unit rate at which the machines crushes the fruit. This boils down to dividing the amount it can crush (3 + 1/4 kg) by the time it takes to do the crushing (3/4 min):

(3 + 1/4 kg) / (3/4 min)

We can omit the units, just remember everything is measured in kilograms per minute. So we want to simplify the expression,

(3 + 1/4) / (3/4)

Write the numerator as an improper fraction:

3 + 1/4 = 12/4 + 1/4 = 13/4

(since 12 = 3*4)

Then

(3 + 1/4) / (3/4) = (13/4) / (3/4)

Multiply this by 1 = 4/4. In other words, multiply both the numerator and denominator by 4. This eliminates the fractions in either part, and you get the answer:

(13/4) / (3/4) * 4/4 = (13/4 * 4) / (3/4 * 4) = 13/3

So in one minute, the machine can crush 13/3 kg ≈ 4.333 kg of dried fruit.

Answer:

220

Step-by-step explanation:

Answer:

43.98

Step-by-step explanation:

did some quick maths

c=2

[tex]c = 2 \times \pi \times r[/tex]

Answer:

52

Step-by-step explanation:

Answer:

idrk i'm just going to take ur points because my other account got banned for 24 hrs like bru.h ig :/

Step-by-step explanation:

Answer:

it would be 13.25 or A.

Step-by-step explanation:

:)

Let the length of the side of the square being cut out equal x

The length of the box would be 4.5 - 2x

The width of the box would be 3 -2x

Volume = (4.5 -2x) * (3-2x) * x

Simplify to:

V = 4x^3 - 15x^2 + 13.5x

B See picture: The greatest volume would be the point of the highest curve.

x = 0.589 y = 3.565, Rounded to the nearest tenth x = 0.6

Process: entered the equation from A into Desmos. The Y value would be the volume, so found where the volume was the highest and then found the related x value.

C) X is the side length of the corner squares being cut out, which would also be the height of the box. The Y value is the volume of the box.

Answer:

102.9

Step-by-step explanation:

Area of a triangle is A=(1/2)(h)(b) where h is the height and b is the base.

7.35 is the height and 28 is the base

A=(1/2)(7.35)(28)

A=102.9

Answer:

a) 0

b)2

Step-by-step explanation:

a) Basically, the question is asking what the x value is when the y value is at 4, which would be 0.

b) Same thing here, but with the x value is when the y value is -2.

Answer: Wrong formula, forgot to input the radius instead

Step-by-step explanation:

Formula is pie times radius^2

Find radius by dividing the diameter by half then multiplying it by pi (3.14)

Answer:

The top right net would

Hope this helps!

A prism is a three-dimensional object.

There are triangular prism and rectangular prism.

The net in option A represents the rectangular prism.

Option A is the correct answer.

A prism is a three-dimensional object.

There are triangular prism and rectangular prism.

We have,

The rectangular prism has 6 faces.

The net in option A represents the rectangular prism.

Thus,

The net in option A represents the rectangular prism.

Option A is the correct answer.

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Answer:

x=10.21463052 y=  8.755647273

Step-by-step explanation:

i suggest u round.

Answer:

DB = 20 cm

Step-by-step explanation:

Given:

║AB = 12 cm (represented by 'a' leg)

║AD = 16 cm (represented by 'b' leg)

║DB =  x cm (hypotenuse represented by 'c' leg)

These formulas are used to solve for a missing side length:

║a = [tex]\sqrt{(c^2 - b^2)}[/tex]

║b = [tex]\sqrt{(c^2 - a^2)}[/tex]

║c = [tex]\sqrt{(a^2 + b^2)}[/tex]

Because we are solving for side length c, we will be using the third formula.

║c = [tex]\sqrt{(a^2 + b^2)}[/tex]

║c = [tex]\sqrt{(12^2 + 16^2)}[/tex]

║c = [tex]\sqrt{(144 + 256)}[/tex]

║c = [tex]\sqrt{400}[/tex]

║c = 20

Therefore, the value for side length DB should be:

║DB = 20 cm

Answer:

it's D I think

Step-by-step explanation:

..........

Answer:

D

Step-by-step explanation:

A line segment is a straight line that ends , the arrows mean the the ray or line dont end

Answer:

10 cm

Step-by-step explanation:

the can is shaped like a cylinder

first step is to find the radius and then multiply the figure by 2

volume of a cylinder = nr^2h

n = 22/7

r = radius

903 = 11.5 x r^2 x 3.14

r^2 = 903 / (3.14 x 11.5)

r = 5 cm

diameter = 10cm

Answer: 125,000

Step-by-step explanation:

Voulme= LxWxH

             = 50x 50x50

              =125,000

Answer:

[tex] \sqrt{25 \times 3 \times 27} [/tex]

[tex] \sqrt{5²×9²} [/tex]=±[5×9]=±45

Step-by-step explanation:

hope it is helpful to you (｡◕‿◕｡)➜(｡◕‿◕｡)➜