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sattari [20]
2 years ago
15

70 = 7x - 7(2x - 5) How do I solve this ?

Mathematics
1 answer:
Law Incorporation [45]2 years ago
3 0

Answer:

x=-5

Step-by-step explanation:

70=7x-7(2x-5)

70=7x-14x+35

70-35=-7x

35=-7x

5=-x

-5=x

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Someone please help me on these 2 problems!
Veronika [31]

1) function  2) not a function

the first one is a function because its y values are the same number (3), which means it is a horizontal line and horizontal lines are functions.  

the second one is not a function because the coordinates cannot have different inputs but different outputs. each input must have only one output.

the coordinates for the second one are:

(2,5); (1,1); (1,2); (3,2)

and <u>a function cannot have two same x-coordinates</u>. it must pass the vertical line test which is a way to tell if something is a function or not. since the second graph does not pass the vertical line test, it is not a function

hope this helps :)

5 0
3 years ago
Divide and answer in simplest form:
Arturiano [62]
5/3 divide by 3 would be 5/9 so your answer would be C) 5/9.

5/3 * 1/3

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So in total the answer would be C) 5/9.
6 0
2 years ago
Read 2 more answers
456+213 using the break apart strategy
GalinKa [24]
Fist break up each number in the hundreds column add the tens and the ones then add the hundreds to the previous answer
4 0
3 years ago
Question Help
lara [203]

Answer:

4324eqW

Step-by-step explanation:

3 + 5 =7

7 0
3 years ago
You order two tacos and a salad. The salad costs $2.50. You pay 8% sales tax and leave a $3 tip. You pay a total of $13.80. How
denis23 [38]
Let T = cost of a taco
Let S = cost of a salad

(2 tacos + 1 salad) + (8 % of 2 tacos and 1 salad) + 3 = 13.80

2T + S + .08(2T + S) + 3 = 13.80
2T + 2.5 + .08(2T + 2.5) + 3 = 13.80
2T + 2.5 + .16T + .20 + 3 = 13.80
2.16T + 5.7 = 13.80
2.16T = 8.10
T = 8.10/2.16 = $3.75

Check: 2T + S + .08(2T + S) + 3 = 13.80
2(3.75) + 2.50 + .08(2(3.75)+2.5) + 3 = 13.80
7.5 + 2.5 + .08(10) + 3 = 13.8
13.80 = 13.80
Answer checks as correct
8 0
3 years ago
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