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morpeh [17]
4 years ago
8

Reginald answered 78% if the question correctly.what fractional part did he not answer correctly

Mathematics
1 answer:
Rus_ich [418]4 years ago
7 0

We are given that Reginald answered = 78% questions.

Total questions in percentage form could be written as 100%.

Reginald answered = 78% so, Reginald answered didn't answer = 100-78 = 12%.

Now, we need to convert 12% into a fraction.

We know, a percentage represents out of 100. So, we need write 100 in the bottom of that number.

Therefore, 12% could be written as 12/100.

Now, we could reduce 12/100 into simplest fraction, by dividing by a common number in top and bottom.

12 and 100 both can be divided by 4.

Dividing 12 and 100  by 4, we get

\frac{\frac{12}{4} }{\frac{100}{4} } = \frac{3}{25}

Therefore, 3/25 fractional part did he not answer correctly.

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Novay_Z [31]
The correct answer is 8
Because
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6 0
4 years ago
Read 2 more answers
Determine the center and radius of the following circle equation:<br> x2 + y2 – 10x + 8y + 40 = 0
antiseptic1488 [7]

Answer:

The center of this circle is (5, -4) and the radius is 1.

Step-by-step explanation:

First regroup these terms according to x and y :

x^2 - 10x + y^2 + 8y = -40

Next, complete the square for x^2 - 10x:  x^2 - 10x + 5^2 - 5^2.

and the same for y^2 + 8y:  y^2 + 8y + 16 - 16

Substituting these results into x^2 - 10x + y^2 + 8y = -40, we get:

x^2 - 10x + 5^2 - 5^2 y^2 + 8y + 16 - 16 = -40.

Next, rewrite x^2 - 10x + 25 and y^2 + 8y + 16 as squares of binomials:

Then x^2 - 10x + 5^2 - 5^2 y^2 + 8y + 16 - 16 = -40 becomes:

(x - 5)^2 + (y + 4)^2 - 25 - 16 = -40, or:

(x - 5)^2 + (y + 4)^2 = 1

This equation has the form (x - h)^2 + (y - k)^2 = r^2, where (h, k) is the center and r is the radius.  Matching like terms, we get h = 5, k = -4 and r = 1.

The center of this circle is (5, -4) and the radius is 1.

6 0
3 years ago
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Which of the following equations is equivalent to 2/3 x - 1/2 y = 6? 2x - y = 6 2x - y = 36 4x - 3y = 36
boyakko [2]

Answer: THE LAST OPTION

Step-by-step explanation:

1. You have the following equation given in the problem:

\frac{2}{3}x-\frac{1}{2}y=6

2. If you multiply both sides of the equation shown above by 6, you obtain the following:

\frac{2*6}{3}x-\frac{1*6}{2}y=6*6

\frac{12}{3}x-\frac{6}{2}y=36

3. When you simplify the equation, you obtain the following equivalent equation:

4x-3y=36

5 0
3 years ago
Last year, 31 2 acres of strawberry fields produced approximately 14,700 pounds of strawberries. This year the number of acres p
USPshnik [31]

So in 5 acres of land produces 21,000 pounds of strawberries.

Step-by-step explanation:

Step 1:

Last year, 3\frac{1}{2} acres i.e 3.5 acres produced 14,700 pounds of strawberries. So we need to determine how many strawberries were produced per acre.

To do this we divide the total number of strawberries produced by the number of acres it was produced in.

The number of strawberries produced per acre= \frac{14,700}{3.5} = 4,200 pounds.

Step 2:

To determine the number of strawberries in 5 acres of land, we multiply the number of strawberries per acre by the number of acres.

The number of strawberries produced in 5 acres= 5(4,200) = 21,000 pounds.

So in 5 acres of land produces 21,000 pounds of strawberries.

5 0
3 years ago
Please Help!!! brainliest answer!
andrezito [222]
It’s c for sure bro because look at the triangle and the letter trust homie
7 0
3 years ago
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