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BigorU [14]
3 years ago
7

X+7y=0 and 2x-8y=22 This is solved by using the transitive property

Mathematics
1 answer:
andrey2020 [161]3 years ago
3 0
X+7y=0 (a)
2x-8y=22 (b)

1st write te 2 equation in terms of x
(a) x+7y=0 , then x= -7y
(b) 2x-8y=22 → 2x = 22 + 8y and x = 22/2 +8y/2 OR  x = 11 + 4y

x = 11+4y  and x = -7y Then  11 + 4y =  -7y
Now we can extract the value of y:

11+4y = -7y
1st Add +7y to each side →11+4y+7y = -7y + 7y

11+ 11y = 0 . Now subtract 11 from both sides :→11+11y -11 = 0-11
11y = -11 and y = - 1
To find the value of x, replace  the value of y (= - 1) in any of the given equation and you will find x = 7

Does this helped you? 

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Given f(x)=x+3 what is the range, when the domain is {-1,3,5,7}?
natka813 [3]

 Slope = -1

 x-intercept = 3/-1 = -3.00000

 f-intercept = 3/-1 = -3.00000

Slope = 0.667/2.000 = 0.333

 x-intercept = 3/-1 = -3.00000

 f-intercept = 3/3 = 1

Slope = 0.400/2.000 = 0.200

 x-intercept = 3/-1 = -3.00000

f-intercept = 3/5 = 0.60000

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6 0
3 years ago
le Gianna just started a running plan where she runs 20 miles the first week and then increases the number of miles she runs by
yuradex [85]

Answer:

Gianna ran 40 miles over the course of 17 weeks.

Step-by-step explanation:

20 miles in the first week.

5% increase each week.

17 weeks.

  • 5% * 20 = 1

1 mile increase each week.

  • 17 * 1 = 17

17 mile increase over the course of 17 weeks.

  • 20 + 17 = 37

37 miles over the course of 17 weeks.

Round 37 to the nearest whole number.

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4 0
3 years ago
Si un gramo de chocolate vale$38.25¿cuánto costarán 750 gramos?
Anna007 [38]

Answer:

28687.5

Step-by-step explanation:

Un gramo equivale a $38,25, por lo que si tenemos 750 de esos gramos, tendríamos que multiplicarlos para obtener el costo total.

3 0
2 years ago
How can you solve problems by ordering rational numbers from least to greatest?
Mariana [72]

Answer:

B same form

Step-by-step explanation:

By using them for fractions or decimals. You can compare fractions by having them from least to greatest and it helps in getting the same denominator for fractions.

6 0
2 years ago
Read 2 more answers
Use the expression 5a – 2b – 3 + 2b – 6a.
ella [17]

Answer:

5a + (-6a) + (-2b) + 2b + (-3) = -a -3 or -(a + 3) so first answer is correct because -(a + 3) is the same as -(3 + a)

Step-by-step explanation:

4 0
2 years ago
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