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jarptica [38.1K]
3 years ago
9

If t>0 and t^2-25=0 what is the value of t?

Mathematics
2 answers:
noname [10]3 years ago
8 0

Answer:

t =5

Step-by-step explanation:

t^2 - 25 = 0

Add 25  to each side

t^2 - 25 +25= 0+25

t^2 = 25

Take the square root of each side

sqrt(t^2) = sqrt(25)

t = ±5

t >0 so t must be 5

Karo-lina-s [1.5K]3 years ago
7 0

Answer:

5

Step-by-step explanation:

5 > 0 (True)

Plug in 5 for t in the equation.

t² - 25 = 0

(5)² - 25 = 0

(5 * 5) - 25 = 0

(25) - 25 = 0

0 = 0  (true).

~

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Answer:

6y^2-12y-4

Step-by-step explanation:

(8y^2-5y+7) - (2y^2+7y+11)

(8y^2-5y+7)-2y^2-7y-11

Combine like terms:

6y^2-12y-4

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3 years ago
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Solve the system of equations -x+ 2y = –11 and 5x – 8y = 39 by<br> combining the equations.
Alchen [17]

Answer:

x=-5, y=-8. (-5, -8).

Step-by-step explanation:

-x+2y=-11

5x-8y=39

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5x-8y=39

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2 years ago
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3 years ago
Which is the simplified form of the expression 3(7/5x+4) - 2(3/2 - 5/4x)?
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Answer:

B. \frac{67}{10} x + 9

Step-by-step explanation:

Simplify the expression. Remember to go by the order of operations, or PEMDAS.

1) First, distribute the numbers outside of the set of parentheses to the terms inside the set of parentheses next to them. Then, simplify the fractions.

3(\frac{7}{5} x + 4) -2 (\frac{3}{2} -\frac{5}{4} x)

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2) Finally, combine like terms. (This means to add or subtract constants and to add or subtract terms with the same variables.) You may need to convert terms to the same denominator in order to do so easier. Then, reduce the fraction.

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Thus, the answer is \frac{67}{10} x + 9.

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Answer:

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Step-by-step explanation:

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