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kow [346]
4 years ago
8

What is the discriminant of the quadratic equation – 4x2 + 5x – 9 = 0?

Mathematics
1 answer:
patriot [66]4 years ago
8 0

Answer:

-119

Step-by-step explanation:

a=-4 b=5 c=-9

D=b^2-4ac

=5^2-4(-4)(-9)

=25-144

=-119

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The height of tower a is 802 feet more than tower
igomit [66]

The height of tower A is 1016 feet and tower B is 212 feet.

<u><em>Explanation</em></u>

Suppose , the height of tower B is h feet.

As the height of tower A is 802 feet more than tower  B , so the height of tower B will be : (h+802) feet

Given that, the two towers have a combined height of 1226 feet.

So, the equation will be...

h+(h+802)=1226\\ \\ 2h=1226-802\\ \\ 2h=424\\ \\ h= \frac{424}{2}=212

Thus, the height of tower B is 212 feet and height of tower A is (212+802) feet = 1016 feet.


5 0
3 years ago
Mia is 6.99120 × 10^6 minutes old. Convert her age to more appropriate units using years, months, and days. Assume a year has 36
Ivan

Answer:13years 7months 17 days

Step-by-step explanation:

1hr--->60min

116520hrs--->6.99120*10^6

convert hrs to days by dividing by 24

so you have 4855 days

divide it by 30 to get months which will be =161.833333 divide it by 12 to get yrs so you will get 13.48611111 then go ahead and subtract it to get the 13 years 7 months and 17 days

8 0
3 years ago
A homeowner has 5 cherry tomato plants in her garden. Over the course of the season the yields (in pints of tomatoes per plant)
Ivenika [448]
Average means add eveybody and divide by how many there are
5 lants
(4+3.5+4.5+4.2+3.8)/5=4

average is 4
dunno standard deviation


6 0
4 years ago
Read 2 more answers
A marathon is 26.2 miles long. There is a water station every 114 miles along the race route and at the finish line. How many wa
mars1129 [50]

Answer: 21 water stations

Step-by-step explanation:

From the question, we are informed that a marathon is 26.2 miles long and that there is a water station every 1 1/4miles along the race route and at the finish line.

To get the number of water stations that are needed for this marathon, we divide 26.2 miles by 1 1/4miles. This will be:

= 26.2miles/1 1/4 miles

= 26.2 miles/1.25 miles

= 20.96

= 21 water stations

7 0
4 years ago
A mountain bike is priced at $425. If the sales tax is 8.5 percent, what is the cost to purchase the mountain bike? Round to the
MrMuchimi

Answer:

<h3>$461.1</h3><h3 />

Step-by-step explanation:

bike = $425

tax = 8.5%

cost to purchase = $425 ( 1.085)

                            = $461.1

6 0
3 years ago
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