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3 years ago

The temperature decrease from 25 degreesC to 22 degreesC calculate the percentage decrease

Mathematics

1 answer:

Nuetrik [128]3 years ago

5 0

Intial temperature: 25 final temperature: 22

Fi-Ft= ΔT

25-22=3

ΔT= 3

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Help answer please!!

12345 [234]

Answer:

h = 19.7 ft.

Step-by-step explanation:

Use the Pythagoras Theorem

$(Hypotenuse)^2 = (Base)^2 + (Perpendicular)^2\\\\(20)^2=(3.5)^2+(h)^2\\400=12.25+h^2\\400-12.25=h^2\\387.75=h^2\\$

Now we take square root on both sides,

$\sqrt{387.75} =\sqrt{h^2}\\19.69=h\\h=19.7\ ft\\$

so the value of h equals 19.7 ft.

6 0

3 years ago

Solve for x- <br> 6x^2 + 36x + 54 = 0

lions [1.4K]

Answer:

-3

Step-by-step explanation:

$6x^2+36x+54=0$

First, you can factor out a 6:

$6(x^2+6x+9)=0$

Next, you can factor the quadratic:

$6(x+3)^2=0$

Since the only value of x that could set this equation equal to 0 is -3, that is the answer. Hope this helps!

5 0

3 years ago

Write the expression as either the sine, cosine, or tangent of a single angle. tan5x - tan2y / 1 + tan5x tan2y

Kryger [21]

$\bf \textit{Sum and Difference Identities}
\\\\
tan(\alpha + \beta) = \cfrac{tan(\alpha)+ tan(\beta)}{1- tan(\alpha)tan(\beta)}
\qquad
tan(\alpha - \beta) = \cfrac{tan(\alpha)- tan(\beta)}{1+ tan(\alpha)tan(\beta)}\\\\
-------------------------------\\\\
\cfrac{tan(5x)-tan(2y)}{1+tan(5x)tan(2y)}\implies tan(5x-2y)$

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3 years ago

A couple plans to have three children. What is the probability that

Hitman42 [59]

Answer:

1:3 is the probability

Step-by-step explanation:

8 0

3 years ago

WILL AWARD BRAINLIEST AND 30 PTS IF THERE IS A GOOD EXPLANATION. ANSWER IS NOT 243. question: In how many ways can we put five i

Bumek [7]

Answer:

243 ways

Step-by-step explanation:

Fruits = 5

Bowls = 3

Remember that, There are three bowls for five fruits. So the possible outcomes are:

=> $3^5 = 3*3*3*3*3 = 243$ ways

8 0

3 years ago