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garik1379 [7]
3 years ago
10

What is x if x squared minus 6x equals negative 25

Mathematics
1 answer:
Vilka [71]3 years ago
8 0

Answer:

Step-by-step explanation:

x2 - 6x = - 25

Rearrange the equation and let it be equal to 0

x2 - 6x +25 = 0

Using the Almighty formula

x =( -(-6) + √9)/2 or (-(-6) - √9)/2

x =4.5 or-1.5

x = 4.5

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Find the midpoint M of the line segment joining the points A= (-7, -6) and B= (1,8).
Marrrta [24]

Step-by-step explanation:

Use midpoint formula,

x = -6/2 = -3 , y=2/2 =1

(x,y)=(-3,1)

so , the coordinates of mid point of line segment is M (-3,1)

8 0
3 years ago
Helpppppppppppp meeeeeee
MArishka [77]

Answer:

7

Step-by-step explanation:

4 0
3 years ago
Sonia received a statement on her Certificate of Deposit showing that her investment had returned $4,320 over its life. If the C
bija089 [108]

Answer:

The correct answer is -7.5 years.

Step-by-step explanation:

Given:

Principle amount = 12000

Interest = 4320

time = ?

rate = 4.8 simple interest

Solution:

We know that simple Interest I = (P*t*r)/100

then t = I*100/p*r

putting values in formula:

t = 4320*100/4.8*12000

= 432000/57,600

= 7.5 years

6 0
3 years ago
Lisa needs 250 yards of yarn to knit a hat. She has 185 yards of yarn and needs to buy the rest. How many yards of yarn does she
Alecsey [184]

Answer:

it's answer is y + 185 = 250; y = 65

hope it helps you

6 0
3 years ago
Suppose at a large university, 60% of the students have a Visa card and 40% of the students have a MasterCard. Also, 30% of the
Doss [256]

Answer:

0.6,0.7,0.3 neither disjoint nor independent.

Step-by-step explanation:

Given that at a large university, 60% of the students have a Visa card and 40% of the students have a MasterCard.

A= visa card

B = Master card

P(A) = 0.60 and P(B) = 0.40

P(AUB)' = 0.30

i.e. P(AUB) = 0.70

Or P(A)+P(B)-P(AB) =0.70

P(AB)= 0.30

Randomly select a student from the university.

1) the probability that this student does not have a MasterCard.

= P(B') = 1-0.4 =0.6

2.  the probability that this student has either a Visa card or a MasterCard.

=P(AUB) = 0.70

3. Calculate the probability that this student has neither a Visa card nor a MasterCard.

=P(AUB)' = 0.30

4. Are the events A and B disjoint? Are the events A and B independent?

A and B have common prob 0.30 hence not disjoint.

P(AB) ≠P(A)P(B)

Hence not independent

6 0
3 years ago
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