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nordsb [41]
3 years ago
12

Convert 68°F to degrees Celsius.

Mathematics
2 answers:
Dmitriy789 [7]3 years ago
7 0

Answer:

20°

Step-by-step explanation:

Formula given  C= <u>5(F-32)</u>

                                  9

We know that F= 68

We can now change the F to 68

C=<u> 5(68-32)</u> ⇒ C= <u>5(36)</u>   ⇒  C= <u>180 or 5X36</u>

        9                      9                          9

Now we divide 180 by 9.

C= 20°

Best of luck!

tekilochka [14]3 years ago
5 0

Answer:

C=5(68°-32)9

=180×9

=1620°c

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Three-fourths was subtracted from a number, and then 5/4 was added to the result. The sum was -7.
Rasek [7]

Hi there!

Let's start by replacing "a number" by the letter "x" so that we can do an equation and isolate "x" to find your answer :

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

subtract \frac{5}{4} on each side of the equation


x - \frac{3}{4} = -8.25

add \frac{3}{4} on each side of the equation

x = -7.5


-7.5 - 3/4 = -8.25

-8.25 + 5/4 = <u>-7</u>


So your answer is : Three-fourths was subtracted from -7.5, and then 5/4 was added to the result. The sum was -7.


There you go! I really hope this helped, if there's anything just let me know! :)



7 0
3 years ago
A Speedboat increases in speed uniformly from 20m/s to 30m/s for 12.2 s. What is the acceleration of the speedboat?
Aloiza [94]

Answer:

0.82 m/s^2

Step-by-step explanation:

Given data

initial velocity=20m/s

Final velocity= 30m/s

Time = 12.2s

Applying the formula

a= v-u/t

a= 30-20/12.2

a= 10/12.2

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a=0.82 m/s^2

6 0
2 years ago
1. tan a = cot(a + 10°)
Temka [501]

Answer:

a=40+90n

Step-by-step explanation:

Use a cofunction identity on the right hand side or left hand side...

So \tan(a)=\cot(90-a).

We have the equation:

\tan(a)=\cot(a+10)

Make the above replacement:

\cot(90-a)=\cot(a+10)

Since cotangent has period 180 degrees, we can also write this as:

\cot(90-a+180n)=\cot(a+10)

So solving the following will give us a set of solutions for a:

90-a+180n=a+10

Add a on both sides:

90+180n=2a+10

Subtract 10 on both sides:

80+180n=2a

Divide both sides by 2:

40+90n=a

Symmetric property:

a=40+90n

7 0
3 years ago
How many boys are there in a group of 27 students if there are four-fifths as many girls as there are boys?
tekilochka [14]

Answer:

15 boys

Step-by-step explanation:

There are 27 students. The number of girls is only 4/5 of the number of boys. I started by splitting the class. 14 boys and 13 girls doesn't work, so I changed it to 12 and 15. If it was 12 girls and 15 boys, the girls would have 4/5 of the boys, so it must be 12 girls and 15 boys.

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3 years ago
What is the value of x in the product of powers below? 6*9 × 6x = 6² (all exponents)
anyanavicka [17]
The answer is -7 i think
4 0
3 years ago
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