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2 years ago

Find (4 × 10^5) − (9 × 10^2).

Mathematics

2 answers:

netineya [11]2 years ago

8 0

Answer:

Step-by-step explanation:

hope it helps

balandron [24]2 years ago

7 0

10^5 = 100000

10^2 = 100

4 x 100,000 = 400,000
9 x 100 = 900

400,000 - 900 = 399,100

answer: 399,100

hope this helps

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Solve the following simultaneous equations: 1. a) x-y=-5 and x + y = -1

Sonbull [250]

Answer:

x = -3, y = 2

Step-by-step explanation:

x - y = -5

x = -5 + y

Let's put this into the other equation

(-5 + y) + y = -1

-5 + 2y = -1

2y = 4

y = 2

Now we can solve for x by plugging y into either equation

x + (2) = -1

x = -3

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1 year ago

Read 2 more answers

At the Science Museum, there is an exhibition with 150 displays about energy.

tatuchka [14]

1/5

This is a matter of elimination. So let's figure out how many of each display there is. 30% of 150 = 0.30 * 150 = 45 displays about electricity. 2/5 * 150 = 0.40 * 150 = 60 displays about renewable energy 1/10 * 150 = 150/10 = 15 displays about gas. The rest of the displays are about nuclear power. So 150 - 45 - 60 - 15 = 30 displays about nuclear power. Since we want a fraction, we get 30/150 But 30/150 isn't in it's simplest form. The largest number that will evenly divide both 30 and 150 is 30. So divide both the numerator and denominator by 30 (30/30)/(150/30) = 1/5 So 1/5 of the displays are about nuclear power.

8 0

2 years ago

What is144 dividend by 10?

jeka94

14.4 is going to be your answer

7 0

3 years ago

Read 2 more answers

Which of the following correctly shows the length of each radius, the point where the circles intersect, and the equation of the

ollegr [7]

actually box 3 is correct.

because their radiuses are easy to find

but the tangent line is x=-4 or x=4

6 0

3 years ago

Rounded to three decimal places, the value of the irrational number e is .A.3.142B.3.615C.2.718D.2.947

notka56 [123]

REQUIRED:

Round to 3 decimal placed the value of the irrational number e.

Step-by-step solution/explanation;

The letter e in mathematics is also known as the Eular's number and is a mathematical constant used in many calculations especially natural logarithms of numbers.

The value of the Eular's number is approximately;

$e\approx2.71828182846...$

It can continue till infinity, however approximations of this number is always used to avoid unnecessary complications.

Therefore, rounded to 3 decimal places, the value of e is now;

ANSWER:

$e\approx2.718$

Note that we take 3 digits aftre the decimal and then if the fourth digit after the decimal is 5 or greater than 5, we make it 1 and add that 1 to the third digit after the decimal. Otherwise we simply make it zero and cancel it along with all other digits after it.

The digit that follows 8 (third digit) is less than 5, therefore, we write it off along with all other digits after it, and we are left with the decimal point and then ...718.

Option C is the correct answer.

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10 months ago