3 years ago

Not quite sure how to find out if these are functions or not

Mathematics

1 answer:

iVinArrow [24]3 years ago

3 0

number 5 is not and number 7 is a function because every input has exactly one output

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Solve 2x2 + 12x - 14 = 0 by completing the square

vovangra [49]

Answer:

Step-by-step explanation:

$(a+b)^2=a^2+2ab+b^2\qquad(*)\\\\\\2x^2+12x-14=0\qquad\text{divide both sides by 2}\\\\x^2+6x-7=0\qquad\text{add 7 to both sides}\\\\x^2+2(x)(3)=7\qquad\text{add}\ 3^2=9\ \text{to both sides}\\\\\underbrace{x^2+2(x)(3)+3^2}_{(*)}=7+9\\\\(x+3)^2=16\Rightarrow x+3=\pm\sqrt{16}\\\\x+3=-4\ or\ x+3=4\qquad\text{subtract 3 from both sides}\\\\x=-7\ or\ x=1$

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4 years ago

The first five multiples for the numbers 4 and 6 are shown below. Multiples of 4: 4, 8, 12, 16, 20, . . . Multiples of 6: 6, 12,

navik [9.2K]

Answer:

Step-by-step explanation:

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3 years ago

Please help no one is helping me :/

Ket [755]

Your answer would be D. or B. I think but i know it's not A.

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3 years ago

How to solve this 97781÷35

Leno4ka [110]

Hopes this helps:

Answer: 2793 with a remainder of 26.

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3 years ago

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Two functions are given below. F(x)= 4x + 5 and g(x)= 7x + 7. How does the graph of f compare with the graph of g?'

Finger [1]

Since the slope of f(x) is 4 (from 4x) and the slope of g(x) is 7, that means that f(x) changes 4 every time x changes, but g(x) changes 7, making g(x) more steep and f(x) less steep

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3 years ago