Which point on the number line represents the number that can be added to-3
2 answers:
Answer: 3
Step-by-step explanation: This is because the 2 numbers are opposites, which cancel each other out, going back to zero.
<u>To find :-</u>
Which point on the number should be added to -3 to get 0.
<u>Solution :-</u>
<u>The number line</u> ----
-4,-3,-2,-1,0,1,2,3,4
<u>Let us add one by one each number with -3 and check if the result is 0</u>.
(i) -4 + (-3)
= -4 - 3
= -7
(ii) -3 + (-3)
= -3 - 3
= -6
(iii) -2 + (-3)
= -2 - 3
= -5
(iv) -1 + (-3)
= -1 -3
= -4
(v) 0 + (-3)
= 0 - 3
= -3
(vi) 1 + (-3)
= 1 - 3
= -2
(vii) 2 + (-3)
= 2 - 3
= -1
(viii) 3 + (-3)
= 3 - 3
= 0
(ix) 4 + (-3)
= 4 - 3
= 1
___________________________
Therefore, 3, i s the point on the number line that represents the number that can be added to -3 to result in zero.
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Answer: x = 4
Step-by-step explanation:
2x - 3 + 4x = 21
6x - 3 = 21
6x - 3 (+3) = 21 (+3)
6x = 24
24/6
x = 4
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X^2 + y^2 = 8 X-y=0 so x = y
replace x = y into X^2 + y^2 = 8
y^2 + y^2 = 8
2y^2 = 8
y^2 = 8/2
y^2 = 4
y = - 2 and y = 2
because x = y
so x = - 2 and x = 2
solutions:
x= - 2 and x = + 2
y= - 2 and y = + 2
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