3 years ago

What is the value of x in the equation 2.5-0.25x=-3? 7-22 o 1 1 o 22

Mathematics

1 answer:

sweet-ann [11.9K]3 years ago

4 0

Answer:

Step-by-step explanation:

Subtract 2.5 to -3 to get -5.5 and then divide that to -0.25 to get 22.

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How to solve the exponential equation for 3^k2 • 3^-k+2 = 81

wariber [46]

Answer:

k=2

Step-by-step explanation:

3^k*2 * 3^-k+2 = 81

Factor out 81 to be : 3^4

Rewrite the equation:

k*2 - k+2 = 4

k^2 - 2k = 4

Simplify : k+2 = 4

k = 2

6 0

3 years ago

Can someone please help with the last problem

Brut [27]

Answer:

18x +9h

Step-by-step explanation:

Such problems are tedious, but not difficult. The trick is to avoid making mistakes in the algebra.

$\dfrac{f(x+h)-f(x)}{h}=\dfrac{(9(x+h)^2)-(9x^2)}{h}\\\\=\dfrac{9(x^2+2xh+h^2)-9x^2}{h}=\dfrac{18xh+9h^2}{h}=\boxed{18x+9h}$

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2 years ago

Radio signals travel at a rate of 3 x 10^8 meters per second. How many seconds would it take for a radio signal to travel from a

wel

Time = Distance / Speed [ Already mentioned ]

Then, substitute the known values,

t = (9.6 × 10⁶) / (3 × 10⁸)

t = 3.2 × 10⁻² s

In short, Your Answer would be Option B

Hope this helps!

4 0

3 years ago

Is this right from greatest to least or do I have to change anything???

Alinara [238K]

Answer:

Yes its correct

Step-by-step explanation:

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3 years ago

Read 2 more answers

A gardener has a circular flower bed with a radius of 17 feet. If she wants to make a square flower bed with the same area as th

mylen [45]

We know that

• The radius is 17 feet.

First, we find the circular area

$\begin{gathered} A=\pi(r)^2 \\ A=3.14(14)^2\approx3.14\cdot196\approx615.44ft^2 \end{gathered}$

This means the square flower bed will have an area of 615.44 square feet. So, we find its sides with the formula for squared areas

$\begin{gathered} A=l^2 \\ 615.44=l^2 \\ l=\sqrt{615.44}\approx24.808 \end{gathered}$ <h2>Therefore, the bed should have sides of 24.808 feet, approximately.</h2>

8 0

11 months ago