Answer:
-7.14
Step-by-step explanation:
Evaluate
−4.2(−2.8 + 4.5)
Open parenthesis
(-4.2 * -2.8) + (-4.2 * 4.5)
= (11.76) + (- 18.9)
= 11.76 - 18.9
= -7.14
NOTE:
Negative (-) × negative (-) = positive (+)
Positive (+) × positive (+) = positive (+)
Negative (-) × positive (+) = negative (-)
Positive (+) × negative (-) = negative (-)
All I know is that question 1 is B and I think for question 3 is Sammy is correct.
Answer:
A
Step-by-step explanation: The rest of the answers are multiples of 2, and even numbers cannot be a prime
Answer:
= 2,937/2
OR
= 1468.5
Step-by-step explanation:
Given that:
= ( 96 x 16 ) + 14 - ( 163 / 2 )
Solving the brackets first
= 1536 + 14 - 163/2
Taking LCM to make denominators same:
= 1536*2/2 + 14*2/2 - 163/2
= (3,072 + 28 - 163) / 2
By simplifying we get:
= 2,937/2
OR
= 1468.5
i hope it will help you!
4x - y = 3
y = 2x + 13
Substitute the second equation into the first equation:
4x - y = 3 [since y = 2x + 13, you can substitute (2x + 13) for "y" in the equation]
4x - (2x + 13) = 3 Distribute/multiply - into (2x + 13)
4x - 2x - 13 = 3
2x - 13 = 3 Add 13 on both sides
2x = 16 Divide 2 on both sides
x = 8
Now that you know x = 8, plug it into one of the equations to find y
y = 2x + 13
y = 2(8) + 13
y = 16 + 13
y = 29
x = 8, y = 29 or (8, 29)
[proof]
4x - y = 3
4(8) - 29 = 3
32 - 29 = 3
3 = 3
y = 2x + 13
29 = 2(8) + 13
29 = 16 + 13
29 = 29
