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ser-zykov [4K]
3 years ago
5

If the 45 animals on the farm have a total of 150 legs, how many cows does farmer Ken have?

Mathematics
1 answer:
Sliva [168]3 years ago
7 0

Answer:

195

Step-by-step explanation:

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4x^2-7x=15<br> Solve by factoring and please please please explain or show the work
vodomira [7]

Answer:

x=3 and x=-1.25

Step-by-step explanation:

4x^2-7x=15

subtract 15 from each side:

4x^2-7x-15=0

factor  (trying different numbers that the sum is 7 and the quotient is 15)

(2x-6 )(2x+2.5 )=0

2x-6=0 add 6 to each side

2x=6

x=3

2x+2.5=0   subtract 2.5 from each side

2x=-2.5

x=-1.25

8 0
3 years ago
One of the loudest sounds in recent history was that made by the explosion of Krakatoa on August 26-27, 1883. According to barom
liraira [26]

Answer:

150.51 dB

Step-by-step explanation:

Data provided in the question:

decibel level of sound at 161 km distance = 180 dB

d₁ = 161 km

d₂ = 4800 km

I₁ = 180 db

The formula for intensity of sound is given as:

I = 10\log(\frac{I_2}{I_1})

and the relation between intensity and distance is given as:

I ∝ \frac{1}{d^2}

or

Id² = constant

thus,

I₁d₁² = I₂d₂²

or

\frac{I_2}{I_1}=\frac{d_1}{d_2}

therefore,

I = 10\log(\frac{d_1}{d_2})^2

or

I = 10\times2\times\log(\frac{161}{4,800})

or

I = 20 × (-1.474)

or

I = -29.49

Therefore,

the decibel level on Rodriguez Island, 4,800 km away

= 180 - 29.49

= 150.51 dB

8 0
3 years ago
How many minutes are in 5.5 days
Hatshy [7]
There are 7,920 minutes in 5.5 days

60minutes in an hour
24hours in a day

60 times 24 times 5.5 = 7,920
7 0
3 years ago
Read 2 more answers
Which ordered pair is a solution of the equation?<br> y=4x−7
vampirchik [111]

Answer:

Unknown

Step-by-step explanation:

Hi! so you didn't add the ordered pair options but I will do my best :) so if you see the ordered pair (0.7) that could definitely be a solution because using the slope intercept form equation you gave I know that's our y Intercept. the slope is 4/1 so moving up 4 and to the right 1 or down 4 and to the left 1 on a graph could show you more points! If you don't want to draw it you could use Desmos and just put this equation in or give me the ordered pairs and I will give you your answer!

hope this helps :)

8 0
2 years ago
What is the value of the expression 22 + 42 ÷ 22?<br><br> 3<br> 6<br> 8<br> 16
insens350 [35]

Answer:

Step-by-step explanation:

22 + 42 divided by 22

we always to division and multiplication before adding or subtracting, so

(42/22) + 22 = a very lonnggg number = 23.9090909091?????

are you sure the equation is correct?

i can help you

thank you

4 0
3 years ago
Read 2 more answers
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