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DiKsa [7]
3 years ago
7

A classroom has 20 seats arranged in 5 rows of 4 seats each. Each student is randomly assigned a seat.

Mathematics
1 answer:
nadya68 [22]3 years ago
7 0
The probability that the student is placed in the first row is 1 of 5
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Simplify (3a^4-2a^2+5a-10)-(2a^4+4a^2+5a-2
sammy [17]
<span>3a4-2a2+5a-10)-(2a4+4a2+5a-2) 
remove first set of parentheses:
 
apply "-" sign to second parentheses (distributive prop):
 
the - of a - becomes a + :
 
combine like terms:
 

Factor out the variables that are alike:

{(1)a^4 + (-6)a^2 + 0a + (-8)}}} 
0a is just 0, makea the "a" term go away:
 
can try to factor as squares, but it doesn't work out:
8 = (-4) x (+2) product factors cannot add to make 6. </span>
3 0
3 years ago
A piggy bank contains nickels and dimes. There are 160 total coins valuing $10.50. Think about a system of equations that can be
Elodia [21]
x + y = 160 \\ 0.05x + 0.1y = 10.50
First, Substitute x + y = 160 into equation
x = 160 - y
0.05(160 - y) + 0.1y = 10.50 \\ 8 - 0.05y + 0.1y = 10.50 \\ 0.05y = 2.50 \\ y = 50
Substitute that into
x + 50 = 160 \\ x = 110

The answer is 110.

Hope this helps. - M
6 0
3 years ago
State the gradient of the line 2y = 3 - 2x.
lyudmila [28]

Answer:

Step-by-step explanation:

2y = 3 -2x

Rearrange the equation to slope-intercept form

y = -x + 3/2

Slope of line is 3/2.

8 0
3 years ago
If its 1.50$ for 6 how much does each one cost
Lesechka [4]
25 cents each would be the anwser
5 0
3 years ago
Can I get a case in which 0 is not nothing
Tamiku [17]
0 represents nothing so if you have 5 apples you ate 5 of them you have nothing left.
5 0
3 years ago
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