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8090 [49]
3 years ago
7

F(x)= sqrt of 5x+7 and g(x)= the sqrt of 5x-7

Mathematics
1 answer:
ki77a [65]3 years ago
4 0
F(x) = √(5x + 7)

g(x) = √(5x - 7)

(f + g)(x) = f(x) + g(x)

(f + g)(x) = √(5x + 7) + √(5x - 7)

Answer: C)
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John and Emily are brother and sister. John has as many brothers as sisters, and Emily has twice as many brothers as sisters. Ho
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Answer:

4 boys, 3 girls

Step-by-step explanation:

brothers of John ⇒ x

sisters of John ⇒ y

John has as many brothers as sisters:

  1. x = y

brothers of Emily ⇒ x + 1 (Emily have the same amount of brother as John, plus one (John))

sisters of Emily ⇒ y -1 (Emily have the same amount of sister as John, minus one (herself))

Emily has twice as many brothers as sisters:

  1. 2 (y-1) = x+ 1

Now we have a system of 2 equations and 2 variables

x=y (I)

2y - 2 = x + 1 (II)

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Replace x in equation II

2y - 2 = y + 1

2y - y = 2 + 1

y = 3

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Replace y in equation I

x = y = 3

That mean that John have 3 brothers plus himself, there is 4 boys in the family and John have 3 sister, so there is 3 girls in the family

8 0
3 years ago
The equation of line KL is y=-1/2x-6. The equation line WX is 7x-14y=-42. Rewrite the equation of line WX in slope-intercept for
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Kalani and Porter each simplify one of the Expressions below. If they add the results together what will be their sum. Kalani:4×
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Answer:

54

Step-by-step explanation:

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Consider the expression 8 - 6x + 22.
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Step-by-step explanation:

7 0
2 years ago
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