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Katyanochek1 [597]
2 years ago
11

What is an open sentence in math? And how is it different from true or false?

Mathematics
1 answer:
Aleks04 [339]2 years ago
5 0

An open sentence in math means that it uses variables, meaning that it is not known whether or not the mathematical sentence is true or false.

A closed sentence, on the other hand, is a mathematical sentence that is known to be either true or false

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Cidnee is weighing combinations of geometric solids. She found that 4 cylinders and 5 prisms weigh 32 ounces and that 1 cylinder
vitfil [10]

Answer:

The weights of each cylinder and prism are 3 and 4 ounces, respectively.

Step-by-step explanation:

Let be x and y the masses of a cylinder and a prism, measured in ounces, respectively. After a careful reading of the statement we get the following linear equations by interpretation:

i) <em>She found that 4 cylinders and 5 prisms weigh 32 ounces:</em>

4\cdot x +5\cdot y = 32\,oz (Eq. 1)

ii) <em>And that 1 cylinder and 8 prisms weigh 35 ounces:</em>

x + 8\cdot y = 35\,oz (Eq. 2)

Now we solve the system of linear equations algebraically:

From (Eq. 2):

x = 35 - 8\cdot y

(Eq. 2) is (Eq. 1):

4\cdot (35-8\cdot y) + 5\cdot y = 32

140-32\cdot y +5\cdot y = 32

32\cdot y - 5\cdot y = 140-32

27\cdot y = 108

y = 4\,oz

From (Eq. 2):

x = 35 - 8\cdot (4)

x = 35 - 32

x = 3\,oz

The weights of each cylinder and prism are 3 and 4 ounces, respectively.

4 0
3 years ago
Plz answer i will mark brainliest if you guys get it right
AnnZ [28]

Answer:

#1. 2 and 16

#2. 12

Step-by-step explanation:

3 0
3 years ago
Please help me!!!!!!!!!!
kirill [66]
I think the  answer may be D. You can graph the points and draw  a line through the points to see what other points are intersected by the line. 
5 0
3 years ago
At a local clothing store you can purchase 3 t shirts for 18.00$ at that rate how much would it cost to purchase 7 t shirts
Ksju [112]
3t shirts cost $18

1 shirt will cost 18/3t  = 6/t

7t shirts will then cost =  (6/t)*7t = 42

7t shirts will cost $42.00
 
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3 years ago
How to find the Area of a triangle
JulijaS [17]

Answer:

A = h b/2

Step-by-step explanation:

7 0
3 years ago
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