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attashe74 [19]
3 years ago
8

45 Tyrone is converting 50 to a percent. Which method should he use to find the percent? Divide the numerator and denominator of

the fraction by 2. Subtract 40 from the numerator and denominator of the fraction. Multiply the numerator and the denominator of the fraction by 2. Add 50 to the numerator and denominator of the fraction.​

Mathematics
2 answers:
laiz [17]3 years ago
8 0

Answer:

3. multiply the numerator and denominator of the fraction by 2

Step-by-step explanation:

Multiplying the numerator and denominator by 2 is like multiplying the fraction by 2/2. 2/2 is one so it doesn't change the value.

Dmitrij [34]3 years ago
3 0

Answer:

❌Divide the numerator and denominator of the fraction by 2.

❌Subtract 40 from the numerator and denominator of the fraction.

✔️Multiply the numerator and the denominator of the fraction by 2.

❌Add 50 to the numerator and denominator of the fraction.

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show that thw roots of the equation (x-a)(x_b)=k^2 are always real if a,b and k are real. Please I really need help with this
VLD [36.1K]

Answer:

see explanation

Step-by-step explanation:

Check the value of the discriminant

Δ = b² - 4ac

• If b² - 4ac > 0 then roots are real

• If b² - 4ac = 0 roots are real and equal

• If b² - 4ac < 0 then roots are not real

given (x - a)(x - b) = k² ( expand factors )

x² - bx - ax - k² = 0 ( in standard form )

x² + x(- a - b) - k² = 0

with a = 1, b = (- a - b), c = -k²

b² - 4ac = (- a - b)² + 4k²

For a, b, k ∈ R then (- a - b)² ≥ 0 and 4k² ≥ 0

Hence roots of the equation are always real for a, b, k ∈ R


           

8 0
3 years ago
1. Do you the following side lengths form a right triangle?2. Which measurement is closest to the value of X in centimeters?
koban [17]

Answer:

Part 1:

Yes, the side lengths form a right triangle.

Part 2:

Option d 37.1 cm

Explanation:

We need to use the pythagorean theorem.

In part 1, if the 3 side lengths are a right triangle, then, they must verify:

7.5^2=4.5^2+6^2

By the theorem. Then:

\begin{gathered} 7.5^2=56.25 \\ 4.5^2+6^2=20.25+36=56.25 \end{gathered}

They're equal, then the lengths correspond to a right triangle.

For part 2, we need to use again the theorem. In this case:

\begin{gathered} 12^2+x^2=39^2 \\ x=\sqrt{1521-144} \\ x=\sqrt{1377} \\ x\approx37.1cm \end{gathered}

6 0
1 year ago
Which mixed number correctly describes the shaded area of the fraction bars? 2One-half 2Two-sixths 2Two-fifths 3
alexandr1967 [171]

Answer:

File doesn't appear, can't help you without enough infomation.

Step-by-step explanation:

5 0
3 years ago
Can you tell me what X=
mihalych1998 [28]

Answer:

x = 21 degrees!

Step-by-step explanation:

3x + x + 96 = 180

4x +96 = 180

Subtract 96 from both sides!

4x = 84

Divide by 4 from both sides!

x = 21 degrees

4 0
2 years ago
Read 2 more answers
Just click the picture you don't have to show your work. IF you want to you can tho.
weeeeeb [17]
The correct answer is A.

That is because the whole paragraph talks about a model car that they are testing but this student is wondering about roller coasters.

Hope this helps :)
8 0
3 years ago
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