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3 years ago

HEEEEEELLLLLPPPPP ...... Pls help with this worksheet

Mathematics

2 answers:

faltersainse [42]3 years ago

6 0

First you identify a,b,c which is: a=2, b=0, c=0
and plug those numbers into the quadratic formula.

Juliette [100K]3 years ago

4 0

I believe the idea is to use a different strategy than Karen's.
The quadratic formula applies to almost any quadratic equations, but very often not as fast if other (easier) methods are available, such as the given problem.

We can also solve the given problem 2x^2=200 by factoring.
Transpose the constant 200 to the left to form an equation of the form:
2x^2-200=0
First extract the common factor 2
2(x^2-100)=0
by the property of zero product, either 2=0 or (x^2-100)=0.
Since 2 ≠ 0, we conclude that
(x^2-100)=0
which means
(x+10)(x-10)=0 (by the difference of two squares, x^2 and 10^2.
Again, by the property of zero product, either
(x+10)=0, or (x-10)=0 or both.
Solving both equations gives us
x=-10, or x=+10

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Give the equation of a line that has no x-intercepts no y-intercepts an infinite number of y-intercepts a point that is both the

WITCHER [35]

Answer:

The x-intercept is (-2,0)

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

A landscape architect wished to enclose a rectangular garden on one side by a brick wall costing $20/ft and on the other three s

makvit [3.9K]

Answer:

The dimensions of the garden that minimize the cost is 9.018 feet(length) and 13.528 feet(width)

Step-by-step explanation:

Let the length of garden be x

Let the breadth of garden be y

Area of Rectangular garden = $Length \times Breadth = xy$

We are given that the area of the garden is 122 square feet

So, $xy=122$ ---A

A landscape architect wished to enclose a rectangular garden on one side by a brick wall costing $20/ft

So, cost of brick along length x = 20 x

On the other three sides by a metal fence costing $10/ft.

So, Other three side s = x+2y

So, cost of brick along the other three sides= 10(x+2y)

So, Total cost = 20x+10(x+2y)=20x+10x+20y=30x+20y

Total cost = 30x+20y

Substitute the value of y from A

Total cost = $30x+20(\frac{122}{x})$

Total cost = $\frac{2440}{x}+30x$

Now take the derivative to minimize the cost

$f(x)=\frac{2440}{x}+30x$

$f'(x)=-\frac{2440}{x^2}+30$

Equate it equal to 0

$0=-\frac{2440}{x^2}+30$

$\frac{2440}{x^2}=30$

$\sqrt{\frac{2440}{30}}=x$

$9.018 =x$

Now check whether it is minimum or not

take second derivative

$f'(x)=-\frac{2440}{x^2}+30$

$f''(x)=-(-2)\frac{2440}{x^3}$

Substitute the value of x

$f''(x)=-(-2)\frac{2440}{(9.018)^3}$

$f''(x)=6.6540$

Since it is positive ,So the x is minimum

Now find y

Substitute the value of x in A

$(9.018)y=122$

$y=\frac{122}{9.018}$

$y=13.528$

Hence the dimensions of the garden that minimize the cost is 9.018 feet(length) and 13.528 feet(width)

4 0

3 years ago

number from 1 to 99 is written on a card making a pack of 99 cards. What is the probability of randomly selecting a card where t

andriy [413]

Answer:

(19/99) = 0.192

Step-by-step explanation:

Numbers 1 to 99, that is 99 numbers (obtained through the equation for the nth term of an AP)

L = a + (n-1) d

L = nth term = 99

a = first term = 1

n = number of terms = ?

d = common difference = 1

99 = 1 + (n-1)1

n = 99

Sample space = 99

The numbers that include at least, a 1 are

1, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 31, 41, 51, 61, 71, 81, 91

19 numbers.

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Hope this Helps!!!

3 0

4 years ago

11 y + 4 one step equations

mixas84 [53]

I think its 15+y or 15y im not surw

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4 years ago

Ray earns $15 an hour for up to 40 hours a week. If he works more than 40 hours a week, he is paid time and a half. That means R

maw [93]

46 is your correct answer bc 30 plus 16 is 46

6 0

3 years ago