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Ket [755]
3 years ago
15

A car travels 21 km in 16 minutes. What is its average speed in km/h?

Mathematics
1 answer:
bekas [8.4K]3 years ago
6 0

Answer:

78.6km/h

Step-by-step explanation:

<em><u>Speed=distance÷time</u></em>

<u>distance</u>=21km

<u>time</u>=16 minutes<u>(convert into hour by dividing it</u> <u>with 60)</u>

=16÷60=0.267

Speed=21÷0.267=78.65km/h

speed =  \frac{distance }{time}

speed =  \frac{21}{0.267}  = 78.6km(h

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3. PLEASE HELP! Jenna just opened a checking account at the bank. Within the first month, she deposited three checks for $34.98,
sashaice [31]

Answer:C) She would have $216.88.

Step-by-step explanation:

A) Deposits:  +34.98; +51.02; +51.22

Withdrawals:  -5.23; -5.22; -7.89

B) -7.89, -5.23, -5.22, +34.98, +51.02, +51.22

The smallest amount will be the largest withdrawal, as it takes away from the account; the largest amount will be the largest deposit, as it adds to the account.

98 + 34.98 = 132.98 + 51.02 = 184.00 + 51.22 = 235.22 - 7.89 = 227.33 - 5.23 = 222.10 - 5.22 = 216.88

8 0
3 years ago
Read 2 more answers
Help me out please.. thank uu
Free_Kalibri [48]
Answer: y = -1/4 * x - 4

Explanation:
Slope intercept form : y = mx + b
m = slope & b = y intercept
y = mx + b
y = -1/4(x) + b
y = -1/4(x) - 4

-1/4 is slope
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5 0
3 years ago
What is 0.9 3 4 5 / 0 15 what is 0.345 / 0 15
DaniilM [7]

Answer:

the answer is 2.5

Step-by-step explanation:


5 0
3 years ago
Solve for z. 4/z =12/5
svp [43]

\dfrac{4}{z}=\dfrac{12}{5}\\\\ 12z=20\\\\ z=\dfrac{20}{12}=\dfrac{5}{3}

4 0
3 years ago
Read 2 more answers
Which expression shows the first step in dividing 5x + 3 by x?
klemol [59]

Answer:

  B)  5x/x +3/x

Step-by-step explanation:

Choice B is the only choice showing a correct denominator: x.

Here, the "first step" is apparently to divide <em>each term</em> by the denominator. This is reasonable when the denominator is only one term.

(I'd say the first step is to divide the <em>first term</em> by the first term of the denominator.)

4 0
3 years ago
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