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VikaD [51]
3 years ago
7

Which of the following are solutions to the equations below? x^2+x-20=0

Mathematics
2 answers:
Sveta_85 [38]3 years ago
5 0

Answer:

x=4  x=-5

Step-by-step explanation:

x^2+x-20=0

Factor

What 2 numbers multiply to -20 and add to 1

-4*5 =-20 and

-4+5 =1

(x-4) (x+5) =0

Using the zero product property

x-4 =0  x+5=0

x=4  x=-5

irinina [24]3 years ago
4 0

Answer:My answer would be

x=4,-5

tell me if I am wrong


Step-by-step explanation:


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An isosceles triangle always has three interior angles that measure 60° each.
Nataly [62]

Answer:

False

Step-by-step explanation:

The definition given is that of an equilateral triangle, NOT that of an isosceles triangle. An isosceles triangle has <em>at least</em> two angles that are equal by definiton. They need not be 60 degrees. For example, a triangle with angle measures of 140, 20, and 20 is an isosceles triangle because two of the angles are equal. Hope this helped!

5 0
3 years ago
Which expresión is equvalient yo 810-210+20+20
andrezito [222]

Answer:

640

Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
The domain of the following relation: R {(6, -2), (1, 2), (-3, -4), (-3, 2)} is
monitta
The domain is the set of possible inputs, i.e. the x-coordinates of the points.

Here those are 6, 1 and - 3 which in order is -3, 1, 6.

Then the answer is {-3, 1, 6}.

By the way note that this relation is not a function. Do you know why?

Because the image of -3 is not stated unambiguosly.



5 0
3 years ago
A particular state has elected both a governor and a senator. Let A be the event that a randomly selected voter has a favorable
Elodia [21]

Answer:

Step-by-step explanation:

Given that A be the event that a randomly selected voter has a favorable view of a certain party’s senatorial candidate, and let B be the corresponding event for that party’s gubernatorial candidate.

Suppose that

P(A′) = .44, P(B′) = .57, and P(A ⋃ B) = .68

From the above we can find out

P(A) = 1-0.44 = 0.56

P(B) = 1-0.57 = 0.43

P(AUB) = 0.68 =

0.56+0.43-P(A\bigcap B)\\P(A\bigcap B)=0.30

a) the probability that a randomly selected voter has a favorable view of both candidates=P(AB) = 0.30

b) the probability that a randomly selected voter has a favorable view of exactly one of these candidates

= P(A)-P(AB)+P(B)-P(AB)

=0.99-0.30-0.30\\=0.39

c) the probability that a randomly selected voter has an unfavorable view of at least one of these candidates

=P(A'UB') = P(AB)'

=1-0.30\\=0.70

3 0
3 years ago
PLEASE HELP ASAP!!!! I HAVE ONLY 2 ATTEMPTS LEFT! I WILL AWARD BRAINLIEST IF YOU ANSWER THEM BOTH CORRECTLY!
liq [111]

Answer:

They both have no possible solution.

Step-by-step explanation:

Don't know how to explain, but it's 100% right

7 0
3 years ago
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