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vovikov84 [41]
4 years ago
15

Solve each quadratic equation. Show your work. 4x^2=100

Mathematics
1 answer:
ZanzabumX [31]4 years ago
4 0
Hello there!

4x² = 100

We wanna start by dividing both sides by 4

4x²/4 = 100/4

x² = 25

Now we can take square root

x = +/-√25

x = 5 or x = -5

As always, it is my pleasure to help students like you!
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4 years ago
Help me pleaseeeeeee
Yuri [45]

Answer:

See below ~

Step-by-step explanation:

A lies between 665 and 670.

Let's answer the questions asked.

<u>A rounded to the nearest ten</u>

  • As the ones place value of A is clearly greater than 5, it will round up
  • The nearest ten is <u>670</u>

<u></u>

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2 years ago
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Can you answer these? I don't understand this part either. Thanks
Flura [38]
9x+10=12x-11
We put 12x on the left side and 10 on right side
9x-12x=-11-10
Now we add x and free numbers 
-3x=-21
And our result is:
x=7

3(x-8)=5x+7
3x-24=5x+7
3x-5x=7+24
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3 0
4 years ago
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Maria can paddle her canoe 2 miles upstream against the current in the same time it would take her to paddle 6 miles downstream.
BigorU [14]
The answer is 2. Imagine Maria can paddle 4 miles in either direction if there was no current in 2 hours. But if we add the current then we would subtract 2 when she goes upstream so she would get 4-2 which is 2 miles. And would get an extra 2 miles going downstream. So 4+2= 6 miles.

So the speed of the current is 2 mph.

Hope this helps!
8 0
4 years ago
A triangle has angles with measures of (3x) (2x - 13)", and (5x+3).
White raven [17]

Answer:

c. 25°

Step-by-step explanation:

Sum of angles in a triangle:

The sum of the measures of the angles of a triangle is 180º.

In this question:

Angles of 3x, 2x-13 and 5x + 3.

The sum is 180º. So

3x + 2x - 13 + 5x + 3 = 180

10x - 10 = 180

10x = 190

x = \frac{190}{10}

x = 19

Measure of each angle:

3x = 3(19) = 57º

2x - 13 = 2(19) - 13 = 38 - 13 = 25º

5x + 13 = 5(19) + 3 = 95 + 3 = 98º

The smallest angle is 25º, and the correct answer is given by option c.

5 0
3 years ago
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