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3 years ago

Solve x2 - 13x + 30 = 0

Mathematics

2 answers:

Svetllana [295]3 years ago

6 0

Answer:

or, x2-(2-15)x +30= 0

or, x2-2x-15x + 30= 0

or,x(x-2)-15(x-2)=0

or, (x-2) (x-15)=0

either, or,

x-2=0 x-15=0

almond37 [142]3 years ago

5 0

Answer:

x2-(10+3)x+30=0

x2-10x-3x+30=0

x(x-10)-3(x-10)=0

(x-10)(x-3)=0

either, or,

x-10=0 x-3=0

x=10 x=3

therefore,x=10,3

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Derivative of y= 2^(sin pi x)

laila [671]

Take log of both sides
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Use log property to get "x" out of the exponent
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Move y to Right side (Note y = original expression)
$\frac{dy}{dx} = (\pi \ln 2) (\cos \pi x) 2^{\sin \pi x}$

In general, whenever you have a function in the form
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3 0

3 years ago

Let f(x)=5x+2 find f(-6)

LuckyWell [14K]

Answer:

-28

Step-by-step explanation:

Plugging in -6 as x we get 5(-6) + 2, which simplifies to -30 + 2 or -28.

8 0

3 years ago

Given a polynomial function f(x), describe the effects on the y-intercept, regions where the graph is increasing and decreasing,

Morgarella [4.7K]

First one, the whole graph was moved down 1 unit

ssecond one, the graph was moved down 1 unit and reflected across the y axis

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4 years ago

Bansi has 3 times as many two-rupee coins as he has five-rupee coins. If he has in all a sum of Rs 77, how many coins of each de

Vinvika [58]

5 rupee coins = x

Two rupee coins = 3x

5(x) + 2(3x) = 77

5x + 6x = 77

11x = 77

77/11 = 7

x=7

Five rupee coins = 7

Two rupee coins = 3(7) = 21

4 0

4 years ago

Which math expression means "44 more than an unknown number"?

worty [1.4K]

Answer: C. X + 44

Step-by-step explanation:

Let x be the unknown number.

Given statement : "44 more than an unknown number".

By using addition operation ,

Mathematical expression for "44 more than an unknown number" = 44 +x

Hence, the correct expression is x+44.

So, the correct option is C.

5 0

3 years ago