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Natalka [10]
2 years ago
10

Mrs. Reeves has 20 identical boxes. She knows that she has 2 boxes of pens, 10 boxes of paper, 2 boxes of crayons, and 6 box3es

of glue. She opens one box. What is the probability it is glue?
Mathematics
1 answer:
Inessa05 [86]2 years ago
8 0

Answer:

3/10

Step-by-step explanation:

Probability box opened is glue = number of boxes that contain glue / total number of boxes

6/20

To transform to the simplest form. divide both the numerator and the denominator by 2

3/10

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Can the formula F=ma be a direct variation equation? If so, which variable would have to be held constant?
ANEK [815]
Yes it can be a direct variation.  it follows the form y = kx
The only variable that cannot be held constant is F, but we can hold the mass constant and vary the acceleration OR we can hold the acceleration constant and vary the mass.  Either one would work, but the easiest would be to vary the mass and hold the acceleration constant since we are all pulled by the same action gravity


6 0
3 years ago
Janeel has a 10-inch by 12-inch photograph. She wants to scan the photograph, then reduce the result
Vaselesa [24]

<u>Complete Question:</u>

Janeel has a 10 inch by 12 inch photograph. She wants to scan the photograph, then reduce the results by the same amount in each dimension to post on her Web site. Janeel wants the area of the image to be one eight of the original photograph. Write an equation to represent the area of the reduced image. Find the dimensions of the reduced image.

<u>Correct Answer:</u>

A) (10-x)(12-x)=15

B) Dimensions are : Length = 10-x = 3 inch , Breadth = 12-x = 5 inch

<u>Step-by-step explanation:</u>

a. Write an equation to represent the area of the reduced image.

Let the reduced dimensions is by x , So the new dimensions are

length=10-x\\breadth=12-x

According to question , Area of new image is :

⇒ Area = \frac{1}{8}Length(breadth)

⇒ Area = \frac{1}{8}(10)(12)

⇒ Area = 15

So the equation will be :

⇒ (10-x)(12-x)=15

b. Find the dimensions of the reduced image

Let's solve :  (10-x)(12-x)=15

⇒ 120-10x-12x+x^2=15

⇒ 120-22x+x^2=15

⇒ x^2-22x+105=0

By Quadratic formula :

⇒ x = \frac{-b \pm \sqrt{b^2-4ac} }{2a}

⇒ x = \frac{22 \pm8 }{2}

⇒ x = \frac{22 +8 }{2} , x = \frac{22 -8 }{2}

⇒ x = 15 , x =7

x = 15 is rejected ! as 15 > 10 ! Side can't be negative

⇒ x =7

Therefore, Dimensions are : Length = 10-x = 3 inch , Breadth = 12-x = 5 inch

5 0
3 years ago
I need help with my science about cells​
Alina [70]

Answer:

a. pancreas

other body part is related to urinary system except pancreas as it is related to digestive

b. heart

it is a part of circulatory system whereas other are digestive

c. vagina

as it is female reproductive system

Step-by-step explanation:

3 0
3 years ago
(1 point) Write the given second order equation as its equivalent system of first order equations. u′′+6.5u′−1.5u=8sin(3t),u(1)=
Over [174]

Answer:

v' + 6.5\cdot v = 1.5\cdot u + 8\cdot \sin 3t

Step-by-step explanation:

The differential equation is:

v' + 6.5 \cdot v -1.5\cdot u = 8 \cdot \sin 3t

v' + 6.5\cdot v = 1.5\cdot u + 8\cdot \sin 3t

6 0
3 years ago
HELP ME ANSWER THIS PLZ!!!!!!
alukav5142 [94]

Answer:

25% off $60 = $15

15% off $60 = $9 - 10%= $0.90

Step-by-step explanation:

$60 divided by 4= 25 x 4 = 100 is the whole number

6 0
3 years ago
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