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kondor19780726 [428]
3 years ago
14

A system of equations is graphed on a coordinate plane.

Mathematics
2 answers:
Allisa [31]3 years ago
8 0
The best estimate would be (1,4)
siniylev [52]3 years ago
5 0
By the graph, it looks like (3/4, 3.5) but let's solve it:
4x+2y = 10
-2(2x+3y = 12) -->
-4x-6y = -24
+4x+2y = 10
----------------
0 + -4y = -14
-4y = -14
-4y/-4 = -14/-4
y = 7/2 = 3.33
4x+2y = 10
4x+2(7/2) = 10
4x+7 = 10
4x = 3
x = 3/4 = 0.75
So the solution is at (0.75, 3.33)
closest is C) (1, 4)
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Find two consecutive positive integers such that the sum of their squares is 421 .
maria [59]
We assume the two numbers are x and (x+1)
so x^2+(x+1)^2=421
x^2+(x^2+2x+1)=421
2x^2+2x-420=0
According to the formula of quadratic 
x=14 or-15
cuz we know the two numbers are integers
so x=14
therefore the other number is 15
To make sure that's correct
14^2+15^2=421

Hope that helps you!!


4 0
3 years ago
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Step-by-step explanation:

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3 years ago
Can someone please help me
Ludmilka [50]
Is it number 21 you need help with?
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2 years ago
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Alenkasestr [34]

Answer:

1.45 m

Step-by-step explanation:

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7 0
2 years ago
A bag contains coins of rupees 2 Rupees 1 and 50 paise, in ratio of 1 is to 2 is to 4. if the total amount is rupees 72 find how
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