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leonid [27]
3 years ago
10

Write the number 1.6 x 105 in standard form

Mathematics
1 answer:
Natalka [10]3 years ago
3 0

Answer:

168

Step-by-step explanation:

Multiply normally don't even look at the decimal point then look at how many numbers are after the decimal point after multiplying, then the many times the numbers are after the decimal point in both numbers you will place that decimal point that many places FROM the RIGHT.

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Jean runs 8 mi and then rides 11 mi on her bicycle on a biathlon. She rides 9 mph faster than she runs. If the total time for he
Ipatiy [6.2K]

Let Jean's speed while running = x mph

Then Jean's speed while riding will be = x+9 mph

Distance covered by running = 8 miles

Distance covered by riding = 11 miles

Total time taken to complete the race = 1.5 hours

As, time=\frac{distance}{speed}

So, time for running= \frac{8}{x}

And time for riding= \frac{11}{x+9}

Equation becomes:

\frac{8}{x}+\frac{11}{x+9}=1.5

Now, multiply every term by 2x(x+9) to clear denominators:  

16(x+9)+22x=3x(x+9)

Simplifying it we get

3x^{2}-11x-144=0

Solve the quadratic equation using formula

x= \frac{-b+\sqrt{b^{2}-4ac }}{2a}

putting a=3 , b= -11, c= -144

we get (x - 9)(3x + 16) = 0

where x=9 and x=\frac{-16}{3}

Neglect the negative answer as speed cannot be negative, so x = 9 mph

Hence, Jean's running speed is 9 mph and riding speed is x+9 = 9+9 = 18 mph

4 0
3 years ago
What is blank divided by 750 equals 4
pychu [463]
X/750=4
multiply both sides by 750
x=3000

the number is 3000
6 0
3 years ago
Hii please help i’ll give brainliest!!
cupoosta [38]

Answer:

A

I Had that question before

7 0
3 years ago
Read 2 more answers
The length of a rectangle is 5 inches less than twice its width. The perimeter of the rectangle is 26 inches. What is the width
Yakvenalex [24]

Answer:

w= 6

Step-by-step explanation:

I just started by making an educated guess using the values already given. Then I inserted that into the problem to see if it worked.

L= 2w - 5

I used 6 as a random, educated guess for the value of w.

L = 2(6) - 5

L = 12-5

L = 7

Then, multiply L by 2 to account for both side lengths of the rectangle.

7(2)= 14

Subtract that value from the total perimeter to find what the width must equal.

26 - 14 = 12

Divide that answer by 2 since there are two sides for width.

12/2 = 6

I know this was kind of long, but I hope it helps! :)

3 0
3 years ago
Classify this triangle by its sides.
Leokris [45]
The triangle is equilateral
8 0
3 years ago
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