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Sagot :
Answer:
3. 50
4. 1
Step-by-step explanation:
3.
-5a + 2b - 6c
Substitute the variables, knowing that:
a = -6, b = 4, and c = -2
-5(-6) + 2(4) - 6(-2)
Multiply -5 and -6.
30 + 2(4) - 6(-2)
Multiply 2 and 4.
30 + 8 - 6(-2)
Multiply -6 and -2.
30 + 8 + 12
Add 30 and 8.
38 + 12
Add 38 and 12.
50
4.
√(5x) + 2y
Substitute the variables, knowing that:
x = 5 and y = -2
√(5(5)) + 2(-2)
Multiply 5 and 5.
√(25) + 2(-2)
Multiply 2 and -2.
√(25) - 4
Take the square root of 25.
5 - 4
Subtract 4 from 5.
1
Answer:
ok when you first loaded the x y z fraction question on another page you asked for help where two people had answered saying it was 3 they were wrong the answer is 6 as 18/3 = 6 the answers below are for this question above hope this helps you also
Step-by-step explanation: QU 1 = 50 + QU 2 = 1
Qu 1) -5 a + 2b - 6c = rewrite out empty brackets for a and b and c Then step 2 is to input number's in brackets as a = -6 b = 4 and c = -2 we substitute so write out first (-5 ( )) + 2( ) - (6( )) if all polynomials are + - we show so like in bold then its easier to determine what to fill in to substitute (-5 (-6)) + 2(4) - (6(-2)) = 30 + 8 + 12 = 50 if we rewrote like this instead (-5 (-6)) + 2(4) -6(-2)) it would also be right so the answer is 50 Qu 2) sq rt 5x +2 y = (when x = 5 and y = -2) sq rt 5(5) and + 2(-2) = sq rt 25 -4 = 5 -4 = 1 Hope this helps also free worksheet info for graphs to explain things math.utah.edu/~wortman/1050-text-calp.pdf just type www in front helps all students that are struggling with graphs
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