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Lady bird [3.3K]
3 years ago
14

Can someone plz help me only if Yk how to do it !!!!

Mathematics
1 answer:
Shtirlitz [24]3 years ago
6 0
Yes it’s correct because 9 is x and if you substitute you do 9 x -9 which gives you y and is -81
You might be interested in
I’m confused, it’s domain and range
nikklg [1K]

Step-by-step explanation:

domain: x-values

range: y-values

<u>Graph 8</u>:

domain: -2 ≤ x ≤ 4 (the lowest x-value is -2 and the highest is 4)

range: 0 ≤ y ≤ 6 (the lowest y-value is 0 and the highest is 6)

<u>Graph 9</u>:

domain: -∞ ≤ x ≤ 0 (the lowest x-value is negative infinity and the highest is 0)

range: -∞ ≤ y ≤ 0 (the lowest y-value is negative infinity and the highest is 0)

7 0
3 years ago
If 1/3 of 33 bakers can make 89 pretzels in 2 1/2 hours, then how many pretzels can 5 3/4 bakers make in 1 1/2 hours? Explain yo
kari74 [83]

Answer:

27.91 pretzels.

Step-by-step explanation:

Knowing that 1/3 of 33 bakers can make 89 pretzels in 2 1/2 hours, to determine how many pretzels can 5 3/4 bakers make in 1 1/2 hours the following calculation must be performed:

33 x 1/3 = 11

89 / 2.5 / 11 = X

35.6 / 11 = X

3.236 = X

3/4 = 0.75

3.236 x 1.5 x 5.75 = X

4.854 x 5.75 = X

27.91 = X

Therefore, 5 3/4 bakers can make 27.91 pretzels in 1 1/2 hours.

5 0
3 years ago
an item has listed price of 85$. If sales tax rates is 3 percent, how much is the sales tax (in dollars)
laiz [17]

Answer:

$2.55

Step-by-step explanation:

If you Multiply $85 by 0.03 you get your answer because you have to turn the 3% into a decimal which you have to move the decimal two places to the left.

4 0
3 years ago
The life of light bulbs is distributed normally. The standard deviation of the lifetime is 20 hours and the mean lifetime of a b
FinnZ [79.3K]

Answer:

The probability of a bulb lasting for between 480 and 526 hours=0.74454

Step-by-step explanation:

We are given that

Standard deviation of the lifetime,\sigma=20hours

Mean, \mu=500hours

We have to find the probability of a bulb lasting for between 480 and 526 hours.

P(480

P(480

P(480

P(480

P(480

Hence, the probability of a bulb lasting for between 480 and 526 hours=0.74454

5 0
3 years ago
grandpa has some cows and ducks in his farm. all in all there are 8 heads and 26 legs, how many cows and ducks are in there? sol
butalik [34]

Answer:

5 cows  and 3 ducks

okay well there are 8 heads and each animal has a head meaning that there are a total of 8 organisms in total. Cows have 4 legs and ducks have 2. Lets say that c is cows and d is ducks. You would have the equations ...

c+d=8

4c+2d=26  

well d techniacally = 8-c, so plug in (8-c) for the value of d

4c+2(8-c)=26.      Distribute to get

4c+16-2c

and then add like terms. Soy ou would get

2c+16=26.

then just isolate the variable but subtracting 16 from both sides and dividing 2 on both sides. The answer you would get is that c=5 so there are 5 cows. Plug in 5 for c so you get 5+d=8 and tadaaaa you subtract 5 from both sides to get that there are 3 ducks.

hope this helps :)

7 0
4 years ago
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