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3 years ago

How would the number be written in standard form? 30,000+500+70+6

Mathematics

2 answers:

enyata [817]3 years ago

7 0

Answer:

30,576

Step-by-step explanation:

30,756 becuase it is ten thousands, hundreds, tens, and ones.

Lisa [10]3 years ago

4 0

30,576 because 30 fills the thousands and 5,7,6 fill the rest

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Rewrite cot 80° in terms of its cofunction.

zysi [14]

Answer:

tan 10 degrees.

Step-by-step explanation:

tan x = cot (90 - x) so:

cot 80 = cot (90 - 10)

= tan 10.

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2 years ago

The vertex if the parabola below is at the point (2,4) and the point (3,6) is on the parabola. What is the equations the parabol

Sloan [31]

I think the equation is 2(x-2)^2+4

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2 years ago

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Sergey is solving 5x2 + 20% – 7 = 0. Which steps could he use to solve the quadratic equation by completing the

Mrac [35]

Answer:

$5(x^2+4x)=7$

$5(x^2+4x+4)=7+20$

$(x+2)=\pm\sqrt{\frac{27}{5}}$

Step-by-step explanation:

we have

$5x^2+20x-7=0$

step 1

Group terms that contain the same variable, and move the constant to the opposite side of the equation

$5x^2+20x=7$

step 2

Factor 5 left side

$5(x^2+4x)=7$

step 3

Complete the square

$5(x^2+4x+2^2)=7+2^2(5)$

$5(x^2+4x+4)=7+20$

$5(x^2+4x+4)=27$

step 4

Rewrite as perfect squares

$5(x+2)^2=27$

step 5

$(x+2)^2=\frac{27}{5}$

$(x+2)=\pm\sqrt{\frac{27}{5}}$

$(x+2)=\pm\frac{3\sqrt{15}}{5}$

step 6

$x=-2\pm\frac{3\sqrt{15}}{5}$

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3 years ago

Read 2 more answers

7.6.35 Question Help A pilot can travel 400 miles with the wind in the same amount of time as 352 miles against the wind. Find t

Law Incorporation [45]

9514 1404 393

Answer:

21 miles per hour

Step-by-step explanation:

Let w represent the wind speed. Then the travel time is ...

400/(329 +w) = 352/(329 -w)

400(329 -w) = 352(329 +w)

(352+400)w = 329(400 -352)

w = (400 -352)/(400 +352)·329 = 48/752·329 = 21

The wind speed is 21 miles per hour.

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2 years ago

(x+7)(2x+1)=7 solve by using quadratic formula

Olenka [21]

I believe it is x= 7, -2

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2 years ago