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Scilla [17]
3 years ago
11

What is the value of –8(17-12) -2(8-(-2)) ? -4 -2 оооо 2 4 ,

Mathematics
1 answer:
allochka39001 [22]3 years ago
3 0
The answer is 2. If you multiply the brackets out then you will get -40 over -20, and a negative divided by a negative is a positive therefore it is 2.
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I need answers for those asap
nlexa [21]

Answer: x = -5 and y = -5

Step-by-step explanation:

They drew the linear graph for the simultaneous equations on the graph already

The answer the the equations is the intersection of the lines which is (-5,-5) or x = -5 and y = -5

3 0
3 years ago
The function f(t) = 33 sin (pi over 2t) − 20 models the temperature of a periodic chemical reaction where t represents time in h
Gennadij [26K]
The given function is
f(t) = 33 sin( \frac{ \pi }{2} t) - 20
with
t = time, hours
f = temperature, °C


Because the maximum and minimum values for the Sine function are +1 and -1 respectively,
The maximum value of f  = 33 - 20 = 13.
The minimum value of f = -33 - 20 = -53. 

The period, T,  is given by
\frac{2 \pi }{T} = \frac{ \pi }{2} \\ \\ T=4

Answer:
Maximum: 13°;  Minimum: -53°;  period: 4 hours
4 0
3 years ago
Ja'Kiree has a bunch of quarters and nickels in her piggy bank totaling $8.75. If Ja'Kiree has 26 quarters, how many nickels doe
evablogger [386]
Start off by stating your facts. You have a maximum of $8.75. We know that each quarter is 25 cents so we multiply 25x26 equaling 650. Yet we need a decimal so it would be $6.50. Each nickel is worth 5 cents so then you would minus $8.75 and $6.50 getting us to $2.25. Now divide it by 5 cents and you should get 45 nickels. You can also do this by stating that 10 nickels is 50 cents and go until you get 45
6 0
3 years ago
10. Sally wants to buy a bicycle that costs $285. The bicycle is on sale for 15% off. How much
lidiya [134]

$285×15/100

= $42.75 and this is the discount

$285-42.75 = $242.25

Sally will buy the bicycle at $ 242.25

4 0
3 years ago
4 / 500 in scientific notation would be?
Lubov Fominskaja [6]
4/500=0.008

scientific notation form = 8 x 10^9
3 0
3 years ago
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