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sasho [114]
3 years ago
9

Jason's two test scores in English are 87 and 91. What must he score on the third test to get an average test score of 92 or bet

ter for this grading period?​
Mathematics
1 answer:
irga5000 [103]3 years ago
5 0

You first find the average of the first two test scores. When you find the average, you add the two numbers together and then divide by two which gives you 89. You then plug in different scores above the number 89 and find the average of those (89 and x) to see which gives you an average of 92. It’s mostly a guess and check type of problem.

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What is a similar triangle?
statuscvo [17]

\large\text{Hey there!}

\large\text{\bf{Similar triangles}}}\large\text{ \underline{are basically} \boxed{\text{triangles that have the same SHAPE}}}\\\boxed{\large\text{but they can still be different. They can still be similar if one them  is}}\\\boxed{\large\text{rotated or one of them is reflected image of the other triangle}}\checkmark

\large\text{Good luck on your assignment and enjoy your day!}

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5 0
3 years ago
2.<br> - 4x + 9y = 14<br> 12x – 10y = -8<br> ;<br> multiplication
NeTakaya

Answer:

Step-by-step explanation: (Equation 2) = 12(-12+9y/4) - 10y = -8

-144+108y/4 - 10y = -8

-144 + 108y - 40y/4 = -8

-144 + 108y - 40y = -32

108y - 40y = -32+144

68y = 112

Y= 1.64

2-4x+9y=14

12x-10y= -8

2-14+9y = 4x

-12 + 9y = 4x ( equation 3)

(Put in equation 2)

3 0
3 years ago
Read 2 more answers
What is the midpoint of (3,8) and (6,4)
Andrews [41]

(4.5,6) that is what i got.

4 0
3 years ago
R leaks out of a barrel so that the rate of change in the water level is proportional to the square root of the depth of the wat
Irina-Kira [14]
Let y(t) represent the level of water in inches at time t in hours. Then we are given ...
  y'(t) = k√(y(t)) . . . . for some proportionality constant k
  y(0) = 30
  y(1) = 29

We observe that a function of the form
  y(t) = a(t - b)²
will have a derivative that is proportional to y:
  y'(t) = 2a(t -b)

We can find the constants "a" and "b" from the given boundary conditions.
At t=0
  30 = a(0 -b)²
  a = 30/b²
At t=1
  29 = a(1 - b)² . . . . . . . . . substitute for t
  29 = 30(1 - b)²/b² . . . . . substitute for a
  29/30 = (1/b -1)² . . . . . . divide by 30
  1 -√(29/30) = 1/b . . . . . . square root, then add 1 (positive root yields extraneous solution)
  b = 30 +√870 . . . . . . . . simplify

The value of b is the time it takes for the height of water in the tank to become 0. It is 30+√870 hours ≈ 59 hours 29 minutes 45 seconds
5 0
3 years ago
Please help me asap​
Nonamiya [84]

Answer:

Is is geometric. The geometric ratio is -4

Step-by-step explanation:

3 × -4 = -12

-12 × -4 = 48

48 × -4 = -192

8 0
3 years ago
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