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Anvisha [2.4K]
2 years ago
15

HELP ME FAST!!!!!Plz my computers about to go dead ​

Mathematics
2 answers:
Viktor [21]2 years ago
8 0

Answer:

\frac{4}{15}

Step-by-step explanation:

Step 1: Solve

The denominator would be the total group of dolphins while the numerator is the number of dolphins that know the difference between a "strike" anda "ball".

Delvig [45]2 years ago
4 0
It’s 4/15
Answer = 3 3/4
I hope that helps :)
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Can some one help me pleaseee
Effectus [21]

Answer:

Mean = \frac{367}{7} = 52. 42

Step-by-step explanation:

Mean = \frac{23 + 48 + 49+ 55+ 57+63+72}{7} = \frac{367}{7}

4 0
2 years ago
Read 2 more answers
Nicole sold 1 cherry pie and 9 pumpkin pies for $60. Lisa sold 11 cheery pies and 4 pumpkin pies for $90. what's the cost each o
zubka84 [21]
X= cost per cherry pie
y= cost per pumpkin pie

NICOLE
1x + 9y= $60

LISA
11x + 4y= $90


STEP 1
multiply Nicole's equation by -11

-11(1x + 9y)= -11($60)
multiply -11 by all terms

(-11 * x) + (-11 * 9y)= (-11 * 60)

-11x - 99y= -660


STEP 2
add Nicole's new equation from step 1 to Lisa's equation to solve for y (using the elimination method)

-11x - 99y= -660
11x + 4y= 90
the x terms "cancel out"

-95y= -570
divide both sides by -95

y= $6 per pumpkin pie


STEP 3
substitute y value into either original equation to solve for x

x + 9y= $60

x + 9(6)= 60

x + 54= 60
subtract 54 from both sides

x= $6 per cherry pie


CHECK
11x + 4y= $90
11(6) + 4(6)= 90
66 + 24= 90
90= 90


ANSWER: Each cherry pie costs $6 and each pumpkin pie costs $6.

Hope this helps! :)
3 0
3 years ago
4x + 5y = -3<br> 6x - 2y = 5<br> x = <br> y =
mezya [45]

Answer: look at the picture

Step-by-step explanation: Hope this help :D

8 0
2 years ago
Plz help ASAP! I will mark brainliest if correct
MaRussiya [10]
A = L^2
A = L^2 = 2^2 + 4^2 (Pythagorean’s theorem)
A = L^2 = 20
Therefore the area of the square is 20 units square.
5 0
3 years ago
Read 2 more answers
What is the coordinate of the vertex? Help
Ilya [14]
Answer: (6,-20)

Explanation:
The equation f(x) = -(x-6)^2 - 20 is the same as y = -1(x-6)^2 + (-20)
It is in the form y = a(x-h)^2 + k
The vertex is (h,k) 
In this case, h = 6 and k = -20
So that's why the vertex is (6,-20)
3 0
3 years ago
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