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e-lub [12.9K]
3 years ago
14

How do you solve 10x^2 + x - 2 = 0

Mathematics
1 answer:
Zielflug [23.3K]3 years ago
7 0
This is what I got If it helps

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Idk wat to do.....<br>........​
oksano4ka [1.4K]

Answer:

Mean : 95

Median : 85

Mode : 90

Part B : Impossible

Step-by-step explanation:

We can make an equation to find the mean using the first 5 history test scores.

85=\frac{80+75+90+75+95+n}{6} \\ \\ 85=\frac{415+n}{6} \\ \\ 510=415+n \\ \\ n=95

So a 95 would be needed to have a mean of 85.

Next, the median.

First, we sort the first 5 history scores from least to greatest.

We get 75, 75, 80, 90, 95.

Since, 80 is the middle value, it will be used in the calculation of the median.

We can make an equation with this.

82.5=\frac{80+n}{2} \\ \\ 165=80+n \\ \\ n=85

So a score a 85 would be needed to have a median of 82.5

Thirdly, the mode.

Since 90 is already in the set once, we can just have Maliah score another 90 to make 90 the mode (with the exception of 75 of course).

Finally, Part B.

We can use the equation we had for the first mean calculation but change 85 to 90.

90=\frac{80+75+90+75+95+n}{6} \\ \\ 90=\frac{415+n}{6} \\ \\ 540=415+n \\ \\ n=125

So Maliah would need a score of 125 to make her mean score 90, but since the range is only from 0-100, it is impossible.

8 0
3 years ago
What is the value of ?<br> –4<br> –2<br> 2<br> 4
Nastasia [14]
I think its -2
or 2
♡☆
7 0
3 years ago
Read 2 more answers
Round the quantity to th given place value 13.989 to the nearest tenth
Aliun [14]

Answer:

13.989 rounded to nearest tenth is 14.0.

Step-by-step explanation:

3 0
2 years ago
Read 2 more answers
Calculate the length of the circumference of a circle with a diameter of 4cm
MakcuM [25]
Length of circumference is 2πr
2 π r and r is equal to 2 cm
I.e 12.5 cm
6 0
3 years ago
Find the gradient of the line segment between the points (-4,-5) and (2,-4).
Anna11 [10]

Answer:

   1/6

Step-by-step explanation:

The gradient of the line segment is the same as slope

m = (y2-y1)/(x2-x1)

   = ( -4 - -5)/( 2 - -4)

   = (-4+5)/( 2 +4)

   1/6

8 0
2 years ago
Read 2 more answers
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