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Bingel [31]
3 years ago
8

Z2 − 2 = 0 using the quadratic formula

Mathematics
1 answer:
charle [14.2K]3 years ago
4 0

Two solutions were found :

1. z = 2

2. z = -1

Step-by-step explanation:

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there are 49 dogs signed up for the dog show. there are 36 more small dogs than large dogs. how many small dogs are signed up fo
pogonyaev
Okay, so total dogs are 49.
So we know if x=large dogs and y=small dogs, then x+y=49.
Next we are told that there are 36 MORE small dogs than large dogs. We can take that more meaning addition, and x being our value for large dogs. So y=x+36.
After that we now know what value we can plug in for y. So x+x+36=49.
We can then simplify it to 2x+36=49.
Subtracting the 36 from both sides, leaves you with 2x=13.
Followed by dividing both sides by 2, gives you x=6.5. Or 6.5 large dogs.
Now we can plug this into our formula for the small dogs (y=x+36) to give us y=6.5+36, which simplifies to y=42.5. Or 42.5 small dogs. Which is our answer.
We can double check it by adding the small and large dogs together, 6.5+42.5, which gives us 49, our total entries.
4 0
3 years ago
Read 2 more answers
HELP QUICK! 15 POINTS
almond37 [142]
it will be 8.25 hope this helped
6 0
3 years ago
A multiple of 9 with the tens digit that is more than the units digit​
Colt1911 [192]

Answer:

81, tens place is 8 ,unit's pkace is 1, so 8>1, that satisfies.

7 0
3 years ago
Abigail withdrew $15 from checking account. Write an integer to represent the situation.​
aleksandrvk [35]

Answer:

-5

Step-by-step explanation:

Withdrawing means subtracting

8 0
2 years ago
Question is shown below.
Andrei [34K]

ANSWER

D. 4 minutes 40 seconds

EXPLANATION

The given data set showing the number of seconds of each song the playlist is:

283,204,198,229,173,230,168,236,215,204

Let the length of the 11th song be x.

Because he wants the mean to be 3 minutes 40 seconds, which is equal to 220 seconds, we write and solve the following equation for x.

\frac{283 + 204 + 198 + 229 + 173 + 230 + 168 + 236 + 215 + 204 + x}{11}  = 220

\frac{2140 + x}{11}  = 220

2140 + x = 2420

x = 2420 - 2140

x = 280

We convert 280 seconds to minutes.

\frac{280}{60}  = 4 \frac{2}{3}  = 4mins : 40 sec

The correct choice is D

3 0
3 years ago
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