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Solnce55 [7]
3 years ago
9

Work out (5x10^3) x (5x10^7) standard form

Mathematics
1 answer:
dmitriy555 [2]3 years ago
3 0
5*10^3 * 5*10^7= 5*5 *10^3*10^7=25*10^10

Generally u are allowed to leave it as it is but if no

25*10^10=25 * 10000000000 = 250000000000

Here u are!
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2х + y = 20<br> 6x — 5y = 12<br> How do i solve this? This is Systems of equations: Substitution
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3 years ago
A) Find a value for x that makes −x less than 2x
Vedmedyk [2.9K]

Answer:

hight school sucks

Step-by-step explanation:

5 0
3 years ago
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Find the domain over which the function y = x + 6x is monotonic increasing.
iragen [17]

Answer:

x > -3

\sf (-3, \infty)

Step-by-step explanation:

Domain: input values (x-values)

Monotonic increasing:  always increasing.  
A function is increasing when its graph rises from left to right.

The graph of a quadratic function is a parabola.  If the leading term is positive, the parabola opens upwards.  The domain over which the function is increasing for a parabola that opens upwards is values greater than the x-value of the vertex.

<u>Vertex</u>

Standard form of quadratic equation:  \sf y=ax^2+bx+c

\textsf{x-value of vertex}=\sf -\dfrac{b}{2a}

Given function:

\sf y=x^2+6x

Therefore, x-value of function's vertex:

\sf \implies x= -\dfrac{6}{2}=-3

<u>Final Solution</u>

The function is increasing when x > -3

\sf (-3, \infty)

4 0
2 years ago
Estimate the sum or difference 8/9+4/7
Bogdan [553]
Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

To estimate the sum or difference of 8/9 + 4/7 it should be <span>1 1/2

</span>It is also a way to find<span> an approximate answer to a solution. To </span>estimate<span> products and quotients of mixed numbers, round the </span>fractions<span> to the nearest whole number. If the </span>fraction<span> is less than 12 round down and if it is more than 12 round up. First, since 411 is less than 12,8411 rounds down to 8.</span><span>

</span>
6 0
3 years ago
Read 2 more answers
Can someone’s please help
Fiesta28 [93]

Answer:

4.87 ft

Step-by-step explanation:

The height of the skylight =

The height of the blue △ - the height of the red △

Let <em>b</em> ft be the height of the blue △.

sin 60° = \frac{b}{25}

<em>b</em> = 25 sin 60°

Let <em>r</em> ft be the height of the red △.

tan 40° = \frac{r}{20}

<em>r</em> = 20 tan 40°

The height of the skylight

= 25 sin 60° - 20 tan 40°

= 4.87 ft (rounded to the nearest hundredth)

3 0
3 years ago
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