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2 years ago

A number added to 8 times that numbers reciprical is 6, find the number

1 answer:

8 0

Call your unknown number x. The reciprocal would be1/xYou are supposed to add your unknown number to 8 times its reciprocal, orx+8(1/x)This is all supposed to equal 6, so you havex+8/x=6
Solve for x to get your number.
n + 8(1/n) = 6n^2 + 8 = 6nn^2 - 6n + 8 = 0(n - 4)(n - 2) = 0n = 2, 4
So 2 and 4 both are answers in my opinion.

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Use logarithms to solve each equation 2x9/8=111

Illusion [34]

We have this equation:

$2x^{\frac{9}{8}} = 111$

and we need to find the value of x.

First of all, we multiply the whole equation for 1/2, so our goal is to isolate x, therefore:

$x^{\frac{9}{8}}=\frac{111}{2}$

Next step we must do is to apply logarithms:

$logx^{\frac{9}{8}} = log(\frac{111}{2})$

Next, we have to apply identities and then to solve the equation:

$\frac{9}{8}logx = log(\frac{111}{2})$
$logx = \frac{8}{9}log(\frac{111}{2})$
$logx = 1.5504$
$10^{logx} = 10^{1.5504}$

Finally, we have the value of x which was our goal. This is the answer for the question above:

$x= 35.5140$

7 0

3 years ago

In a department store, a $40 dress marked, "save 25%." what is the discount? what is the sales price of the dress?

Bogdan [553]

Answer:

Discount = $10

Sales Price = $30

Step-by-step explanation:

Discount

= 25% of marked price

= 25% x $40

= (25/100) x 40

= $10

Sales price = Marked price - Discount = $40 - $10 = $30

8 0

2 years ago

Correct I’ll give brainlist no links or I’ll report

Margarita [4]

Answer:

-2

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

I need help pls I would appreciate it

KengaRu [80]

1.) D
2.) D
3.) C
4.) C
5.) 56 and 90 I looked for the pattern and followed it.
Get someone else to do 6 I cant

6 0

2 years ago

Is this a function? {(-1,3); (-2,-3); (2,0); (0,2)}

Molodets [167]

Yes, because the x’s aren’t repeated

8 0

2 years ago