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ElenaW [278]
2 years ago
15

What did I do wrong in notes, and why is the answer what it shows on screenshot

Mathematics
1 answer:
Svet_ta [14]2 years ago
7 0

Answer:

Hope you find it helpful and usef

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jill traveled to the ferry office and back. the trip there took 5 hours and the trip back took 4 hours. she averaged 65 mph on t
antoniya [11.8K]

We know from physics class that the formula for distance of a linear motion is given as:

d = v t

Where,

d = distance travelled

v = average velocity

t = time it took to reach the destination

Since the distance going to the office and back is just similar, therefore we can simply equate the two:

v1 t1 = v2 t2

Where 1 signifies going to the office and 2 signifies going back from the office. Therefore this yields to:

v1 * 5 hours = 65 mph * 4 hours

v1 = 52 mph

 

<span>Answer: The average speed going to the office is 52 mph.</span>

4 0
2 years ago
Find the unknown angle measure.
Fofino [41]

Answer:

58 degrees

Step-by-step explanation:

add the 2 shown, 74+48, to get 122 all triangles add up to 180 so subtract 122 from 180 and you get 58

7 0
3 years ago
Read 2 more answers
Does anyone know this?
lakkis [162]

Answer:

obtuse scalene

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Keyona had 254 dollars to spend on 9 books. After buying them she had 11 dollars. How much did each book cost ?
guajiro [1.7K]

Answer:

Each book costs $27.

Step-by-step explanation:

Subtract 254 - 11.

254 - 11 = 243

Now, divide 243 by 9.

243 ÷ 9 = 27

Hope this helped!

8 0
3 years ago
Read 2 more answers
Make a the subject of a2+b2=c2
wel

Answer:

a=\sqrt{c^2-b^2

⇒ a=\sqrt{(c+b)(c-b)}        [Factorized form]

Step-by-step explanation:

Given expression:

a^2+b^2=c^2

We need to make a the subject.

In order to do that we need to solve the expression for a in terms of b and c

We have,

a^2+b^2=c^2

Subtracting both sides by b^2

a^2+b^2-b^2=c^2-b^2

a^2=c^2-b^2

Taking square root both sides in order to remove square of a

\sqrt{a^2}=\sqrt{c^2-b^2}

a=\sqrt{c^2-b^2

The difference of squares can be factorized and written  as:

a=\sqrt{(c+b)(c-b)}    [difference of squares x^2-y^2=(x+y)(x-y) ]

4 0
2 years ago
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