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rosijanka [135]
4 years ago
13

Calculați: a) -5+(-2)•(4-8) B) -10 + (-21)•(-7) d) 6-(-3)•(1-9) e) 8-(-28)•(3-10)

Mathematics
1 answer:
snow_lady [41]4 years ago
6 0

a)  -5+(-2) (4-8) =

(-7)(-4) = 28

b)  -10 + (-21) (-7) =

(-10) + 147 = 137

c)  6- (-3) (1-9)

9 (1-9) = -72

d)  8 - (-28) (3 - 10)

36 (-7) = -252

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One week Jenna rented 4 DVDs and 2 Video Games for $18, the next week she rented 2 DVDs and 1 video game for 9$. Find the rental
tangare [24]
To do this problem you have to create two equations. one would be 18=4x+3y
an the other would be 9=2x+y. in this eqaution X is the number of DVDs and Y is the number of Video games. Then you solve for Y in the second equation and you get y=-2x+9. After that you then input this equation in for the other equation and you will have 18=4x+3(-2x+9). you solve for X in this problem and then you take the answer of x and put it in for x in the other equation. 
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subtract 27 and add the 4x and -6x
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after this you put it in the other equation
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4 0
3 years ago
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3 years ago
What expression could fit with 7(x+2y+3z)
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Step-by-step explanation:

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5 0
3 years ago
23. Cynthia used some of the ordered pairs from the set below to make a new set.
tangare [24]

Answer:

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Step-by-step explanation:

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The domain is {2,4,5}

The third set is (2, -7), (4, -3), (-2,5), (5, 4)

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