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AURORKA [14]
3 years ago
11

Solve -8x^2 -104=0 either by factoring or by using the quadratic formula

Mathematics
1 answer:
Lady bird [3.3K]3 years ago
3 0
Here I hope this helps

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A person spends 1/5 of his salary on rent, 3/7 on food, 1/3 on other expenses and saves the rest. If she earns $21,000 per month
sukhopar [10]

Answer:

$9600 saving / year

Step-by-step explanation:

1/5 of $21000 = 21000 / 5 = $4200 / month on rent

3/7 of $21000 = (21000 / 7) x 3 = $9000 / month on food (shocking right :) food is expensive)

1/3 of $21000 = 21000 / 3 = $7000 on other expenses / month

total savings/month = salary/month - rent/month - food/month - other expenses/month

total savings/month = 21000 - 4200 - 9000 - 7000

total savings/month = $800

<u><em>BUT</em></u> the question asks for savings per year. therefore, we must multiply the savings per month by total months per year (12)

800 x 12 = $9600

the person's total savings per year, with a salary of $21000 per month, is equal to $9600 per year

3 0
1 year ago
a box contains 20 blue marbes, 16 green marbles, and 14 red marbles. two marbles are selected at random. let 3 be the event that
Maksim231197 [3]

Answer:

Let E be the event that the first marble selected is green. Let F be the event that the second marble selected is green. A box contains 20 blue marbles, 16 green marbles and 14 red marbles P(F/E)=15/49 because if the first marble selected is green there are 49 in total and 15 are green. I think this is it.

Step-by-step explanation:

6 0
3 years ago
Caroline’s baby sister weighs 3,415 grams. What is her weight in kilograms?
krek1111 [17]

Answer:

C.3.415 kg

Step-by-step explanation:

Put first number in ones place.Th rest as follows

4 0
3 years ago
If a+ b + c= -6 and x +y = 5, what is 9y +9x - 10a-10c -10b ?
Lisa [10]

Answer:

9y +9x - 10a-10c -10b = 105

Step-by-step explanation:

Given

a+b+c = -6 and x+y = 5

We have to find 9y +9x - 10a-10c -10b

Rearranging the terms

9x+9y-10a-10b-10c

Simplifying will give us:

= 9 (x+y) - 10(a+b+c)

Putting the values of x+y and a+b+c

= 9(5) -10(-6)

=45+60

=105

Therefore,

9y +9x - 10a-10c -10b = 105 ..

5 0
3 years ago
Read 2 more answers
How would this ratio be written as a fraction in simplest form? <br> 24 to 4
olga nikolaevna [1]

Answer:

6 to 1

Step-by-step explanation:

4/2 is 2 and then divide that be 2 and its 1

24/2 is 12 and divide that by 2 and you get 6

5 0
3 years ago
Read 2 more answers
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