isbella29
13.07.2019 •
Mathematics
Simplify: (–8) • (6) – (5) • (–2) simplify: (–4) • (9) – (5) • (–2) evaluate 3(a – 4b) when a = –2 and b = 5. evaluate 4(a – 3b) when a = –4 and b = 6. evaluate 5(a – 2b) when a = –3 and b = 5.
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Ответ:
(–8) • (6) – (5) • (–2)
= (-8*6)-(5*-2)
= (-48)-(-10)
= -48+10
= -38
(–4) • (9) – (5) • (–2)
= (-4*9)-(5*-2)
= (-36)-(-10)
= -36+10
= -26
Evaluate 3(a – 4b) when a = –2 and b = 5.
= 3[-2 - 4(5)]
= 3[-2 -20]
= 3(-22)
= -66
Evaluate 4(a – 3b) when a = –4 and b = 6.
= 4[-4 - 3(6)]
= 4[-4 -18]
= 4(-22)
= -88
Evaluate 5(a – 2b) when a = –3 and b = 5.
= 5[-3 - 2(5)]
= 5(-3 - 10)
= 5(-13)
= -65
Ответ:
Hi!
Simplify: (–8) • (6) – (5) • (–2)
Using PEMDAS
Multiplication
(when you multiply two negatives, you get a positive,
when you multiply one negative and a positive, you get a negative)
-8 * 6 = -48
-5 * -2 = 10
-48 + 10
Subtraction
(imagine a number line)
-48 - 10 = -38
Simplify: (–4) • (9) – (5) • (–2)
Multiplication
-4 * 9 = -36
-5 * -2 = 10
-36 + 10
Subtraction
-36 - 10 = -26
Evaluate 4(a – 3b) when a = –4 and b = 6.
Put in the values, then solve.
4(-4 - 3 * 6)
Solve using PEMDAS
4(-4 - 18)
4 * -22 = -88
Evaluate 5(a – 2b) when a = –3 and b = 5.
5(-3 - 2 * 5)
5(-3 - 10)
5 * -13 = -65
The answers are
-38
-26
-88
-65
Hope this helps! :)
-Peredhel
Ответ:
not enough info
Step-by-step explanation: