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elena-s [515]
3 years ago
7

Find the sale price of a $90 item after a 30% discount. The sale price is $

Mathematics
2 answers:
Lyrx [107]3 years ago
8 0

Answer:

$63

Step-by-step explanation:

100%-30% = 70% of original price.

Thus .7 *90 = $63

Gennadij [26K]3 years ago
5 0
The answer would be $63
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For f(x) = 4x+ 1 and g(x) = x2 - 5, find (f+ g)(x).
horrorfan [7]

Answer:

x^2+4x-4

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4x+1+x^2-5

x^2+4x-4

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3 years ago
Three functions are given below: f(x), g(x), and h(x). Explain how to find the axis of symmetry for each function, and rank the
LuckyWell [14K]

Answer:

1. x=8 is the line of symmetry for f(x) = -4(x − 8)2 + 3

2. x=-2 is the line of symmetry of g(x) = 3x2 + 12x + 15

3. x=3 is the line of symmetry of h(x), shown in the graph.

Step-by-step explanation:

To find the line of symmetry of a vertical parabola (second degree polynomial), find the value of x that sets the squared term to zero.  This is a vertical line passing through the vertex of the second degree function.

1. f(x) = -4(x − 8)2 + 3

setting x=8 will give f(8) = 3, so x=8 is the line of symmetry

2. g(x) = 3x2 + 12x + 15

here, we need to complete the squares,

g(x) = 3x2 + 12x + 15

g(x) = 3(x^2+4x+5)

g(x) = 3(x^2 + 2(2x) +4 +1)

g(x) = 3((x+2)^2 +1)

So setting x=-2 will anihilate or cancel the squared term, therefore

x= -2 is the line of symmetry.

3. the curven shown in graph,

we see that the vertex is at x=3, so x=3 is the line of symmetry.

5 0
3 years ago
1) 5.4 +(-9.7)<br> Find the sum
harina [27]

Answer:

-4.3

Step-by-step explanation:

5.4 +(-9.7)

= 5.4-9.7

=-4.3

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3 years ago
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