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hichkok12 [17]
2 years ago
12

What are the points for a 90 degree rotation counterclockwise about the origin

Mathematics
1 answer:
natulia [17]2 years ago
8 0

Answer:

I think the answer is 180 degree angle

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Jillian is trying to save water, so she reduces the size of her square grass lawn by 8 feet on each side the area of the smaller
horsena [70]

Answer: 20 feet by 20 feet.


Step-by-step explanation:

1. You know that x is the original measure of one side. Since it is a square, all its sides are equal.

2. Therefore, to solve the problem you only need to solve for x, as you can see below:

- You have that:

(a-b)^{2}=a^{2}-2ab+b^{2}

- Then, you obtain the following quadratic equation:

(x-8)^{2} =144\\x^{2}-2(x)(8)+8^{2}=144\\x^{2}-16x-80=0

- Apply the Quadratic formula to solve it:

x=\frac{-b+/-\sqrt{b^{2}-4ac}}{2a}\\a=1\\b=-16\\c=-80

- Then, you obtain:

x_1=20\\x_2=-4

3. The dimensions cannot be negative, therefore, the answer is: 20 feet by 20 feet.


3 0
3 years ago
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Show the fraction, decimal, and final percent for each. Round your percent to the
Luda [366]

Answer:

66 to 70 and 85 to 90

Step-by-step explanation:

8 0
3 years ago
What is the perpendicular line slope of -2x-9y=4
zimovet [89]
The slope would be 9/2
8 0
3 years ago
Calculate 1.6 x 0.215 show your reasoning
WITCHER [35]

Answer:

0.344

Step-by-step explanation:

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2 years ago
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A campus radio station surveyed 500 students to determine the types of music they like. the survey revealed that 199 like rock,
Ostrovityanka [42]
<span>There are 24 who like both rock and country. There are 8 who like all 3 types, and these eight have been counted under the 24. This means that the number who like rock and country but not jazz is 24 - 8 = 16.
We are given a total of 155 who like country. We subtract the 16 who like both rock and country, and are left with 139 people who like country but not rock. (It does not matter whether they like jazz or not).
The probability is 155 out of the total of 500, so 155/500 = 31/100 = 0.31.
</span>
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2 years ago
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