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3 years ago

A car is traveling at a speed of 20 meters per second. What is the cars speed in kilometers per hour

Mathematics

1 answer:

IRISSAK [1]3 years ago

4 0

Answer:

72 km/h

Step-by-step explanation:

We need to convert units

so:

20 m ----- 1 km -------- 3600 s

1 s ----- 1000 m ----1 h

and solve ot

20 x 1 x 3600 s = 72000 we multiply numerators

1s x 1000 m x 1 h = 1000 we multiply denominators

we divide de results 72000/1000 = 72

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How many solutions are there to the system of equations? StartLayout enlarged left-brace 1st row 4 x minus 5 y = 5 2nd row negat

kkurt [141]

Answer:

Only one solution $x=\frac{5}{4},y=0$

Step-by-step explanation:

$4x-5y=5..............(1)\\0.08x+0.10y=0.10...........(2)$

Multiply equation $(2)$ by $50$

$4x-5y=5........(3)$

Now from equation $(1)$ $+$ equation $(3)$

$8x=10\\x=\frac{10}{8}\\x=\frac{5}{4}$

Put the value in equation $(1)$

$5-5y=5\\5y=0\\y=0$

hence only one solution exists $\left(\frac{5}{4},0\right)$ .

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3 years ago

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Law Incorporation [45]

Answer: the answer will be 3

Step-by-step explanation:

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3 years ago

Refer to the diagram shown.

Veseljchak [2.6K]

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2 years ago

R to the 2nd power -6r-8=0

Natasha2012 [34]

R² - 6r - 8 = 0
r² = 7.12
r = -1.12

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3 years ago

You need a 30-year, fixed-rate mortgage to buy a new home for $225,000. your bank will lend you the money at an apr of 5.5 perce

bulgar [2K]

Loan amount, P = 225000
interest = 5.5%/12 per month
Monthly payment, A = 1000

At the end of 30 years,
Future value of loan (with zero repayment)
F1=225000*(1+.055/12)^(30*12)
=1167162.264

Future value of repayment, A=1000 per month
F2= $\frac{A((1+i)^n-1)}{i}$
= $\frac{1000((1+.055/12)^{360}-1)}{.055/12}$
=913611.893

Therefore balloon payment
= F1-F2
=1167162.264-913611.893
=253550.37 (to the nearest cent)

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3 years ago