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3 years ago

34+x=54 koji je rezultat od x

2 answers:

7 0

~Hello There!~

34 + x = 54
x = 54 - 34
x = 20

Hope This Helps You!
Good Luck :)
Have A Great Day ^_^

- Hannah ❤

bulgar [2K]3 years ago

7 0

34 + x = 54

Isolate the x. Note the equal sign. What you do to one side, you do to the other.

Subtract 34 from both sides

x + 34 (-34) = 54 (-34)

x = 54 - 34

x = 20

20 is your answer for x

hope this helps

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80% of the students in Lea’s class earned an A or a B on the weekly math test. If 20 students got an A or a B, how many students

Anna35 [415]

Answer:

80 ÷ 4 = 20, so 100 ÷ 4 = 25 students

Step-by-step explanation:

Is means equals to and of means multiply

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6 0

3 years ago

Read 2 more answers

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2 years ago

Stu trained for a triathlon for 5 hours yesterday. He ran 5 miles and then biked 80 miles. His biking speed is 15 mph faster tha

lara31 [8.8K]

Answer:

Step-by-step explanation:

Given as :

The distance cover while running = $D_1$ = 5 miles

Let The speed for running = $S_1$

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The speed for biking = $S_2$ = 15 mph + $S_1$

Total Time taken = 5 hours

Now Time = $\dfrac{\textrm Distance}{\textrm Speed}$

∴ 5 hour = $\frac{D_1}{S_1}$ + $\frac{D_2}{S_2}$

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Or, 5 hour = $\frac{75 + 5 S_1 + 80 S_1}{S_1(15+S_1)}$

or, 5 × ( $S_1^{2}+15 S_1$ ) = $85 S_1 + 75$

Or, $5 S_1^{2} + 75 S_1$ - $85 S_1 - 75$ = 0

or, $5 S_1^{2} -10 S_1 - 75$ = 0

or, $S_1^{2} -2 S_1 - 15$ = 0

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Or, $S_1 (S_1 - 3) + 5 (S_1 - 3)$ = 0

Or, $(S_1 - 3) ( S_1 + 5 )$ = 0

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So, the running speed = 3 mile per hour

And the biking speed = 15 mph + 3 mph = 18 mile per hour

Hence The running speed of Stu is 3 mile per hour . Answer

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3 years ago

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Answer:

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