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Alexus [3.1K]
3 years ago
9

30 points! The solutions to the equation: 2x2 + x-1 = 2 are x=-3/2 or X=___

Mathematics
1 answer:
frez [133]3 years ago
3 0

Answer: A quadratic equation is one of the form ax2 + bx + c = 0, where a, b, and c are numbers, and a is not equal to 0. So I think x = 4 but not 100%

Sorry if I'm wrong but I hope this helps

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7 0
3 years ago
Find the equation of the straight line passing through the points (4; 2) and (2; 4).
Alecsey [184]
Use point-slope form.

But first let's find the slope.

(4, 2), (2, 4)

m = y2-y1/x2-x1

m = (4 - 2)/(2 - 4)

m = 2/-2

m = -1

So this is the slope, now we can plug this into the equation along with any point.

y - y1 = m(x - x1)

Where y1 is the y-value of the point, x1 is the x-value, and 'm' is the slope.

Let's plug in point (4, 2):

y - 2 = -1(x - 4)

This can be one of your options.

Distribute -1:

y - 2 = -x + 4

Add 2 to both sides:

y = -x + 6

This can be another of your options.

Add 'x' to both sides:

x + y = 6

This can be another of your options.
8 0
3 years ago
Read 2 more answers
HELP PLS (MARKING BRAINLIEST) IF UR CONFUSED, I NEED HELP WITH QUESTION 9 BUT QUESTION 8 IS RELATED TO IT
Serjik [45]

Answer:

Step-by-step explanation:

9. Abby has a tree that is 10 feet long. She cuts the length of the tree into tenth and then cuts the length of each of these 1/10 pieces into fourth. How many pieces does he have? How many feet long is each piece?

1 tree = 10 feet

10 feet ÷ 40 = 0.4 feet

So, each piece is 0.4 feet long.

Answer: 0.4

Step-by-step explanation:

Hope this helps :)

6 0
3 years ago
You estimate that a baby pig weighs 20 pounds. The actual weight of the baby pig is 16 pounds. Find the percent error
nlexa [21]
Divide 16 by 20 to find the percent.

16/20 = 0.8 = 8%

To check, multiply 20 by 0.08

20 x 0.08 = 16

Brainliest answer please? 3 more away from Expert!
7 0
4 years ago
Circumference and area of a circular piece of glass
Vadim26 [7]

Answer:

Area = πr²

Circumference = 2πr

You can use pie as both 22/7 Or 3.14

Step-by-step explanation:

If you like my answer than please mark me brainliest thanks

8 0
3 years ago
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