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3 years ago

X : 8 = 2 : x calculate the positive value of x

Mathematics

1 answer:

goblinko [34]3 years ago

4 0

Answer:

X is 8

Step-by-step explanation:

X/8 = 2/x

Cross multiply

2x = 16

x=16/2

x=8

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Please help on one math question

kipiarov [429]

Hello from MrBillDoesMath!

Answer:

225

Discussion:

Sum ( 2n - 1) from n = 1 to 15

= Sum(2n) - Sum(1) from n = 1 to 15

= 2 Sum(n) - Sum(1) from n = 1 to 15

= 2* 15(15+1)/2 - (1 + 1 + .. + 1)

The first value comes from the fact that the sum of the first n integers is n(n+1)/2. The latter value sums 15 1's.

= 2 * 15 * 16/2 - 15 => 2/2 = 1

= 15*16 - 15 => 15*16 = 240

= 240 - 15

= 225

Thank you,

MrB

6 0

3 years ago

Read 2 more answers

Here is a list of numbers:

ANEK [815]

Answer:

4.5

Hope it helps

5 0

2 years ago

1/ 99 to 4 significant figures

musickatia [10]

Answer:

0.01010

Step-by-step explanation:

The decimal equivalent is ...

$\dfrac{1}{99}=0.\overline{01}$

Rounded to 4 significant figures, it is ...

0.01010

4 0

2 years ago

Determine the equation of the graph shown y = a(x - h)^2 + k

LUCKY_DIMON [66]

Answer:

$y=-(x+1)^2+4$

Step-by-step explanation:

we know that

$y=a(x-h)^2+k$

Is the equation of a vertical parabola written in vertex form

where

(h,k) is the vertex

a is the leading coefficient

In this problem we have

The vertex is the point (-1,4)

$(h,k)=(-1,4)$

substitute

$y=a(x+1)^2+4$

Find the value of a

we have the ordered pair (0,3)

substitute the value of x and the value of y in the quadratic equation and solve for a

$3=a(0+1)^2+4$

$3=a+4\\a=3-4\\a=-1$

therefore

$y=-(x+1)^2+4$

4 0

3 years ago

Which is the slope-intercept form of the equation of a line that passes through (5,-4) and has a slope of 3/4

Andreas93 [3]

Y = mx +b whre m is the slope and b is the y-intercept.

We have the slope 3/4 so put that instead of m

y = 3/4x + b

Now to find the y-intercept (b), plug the ordered pair in and solve for b.

-4 = 3/4 * 5 + b
-4 = 15/4 + b
-31/4 + b

So y = 3/4x - 31/4

4 0

4 years ago