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kkurt [141]
3 years ago
9

Why does the quadratic formula work all the time

Mathematics
1 answer:
Monica [59]3 years ago
3 0

the quadratic formula work all the time because it is suitable for every equation.

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Please help the picture is the has the problem on it
gtnhenbr [62]

it is the second one

8 0
3 years ago
A math teacher randomly selects one student in a class to write a probability question on a chalkboard. The teacher then randoml
Fittoniya [83]

Answer:

The probability to the nearest thousandth is 0.386

Step-by-step explanation:

Firstly, we will need to know the number of girls and the total number of students in the class.

We have the ratio as 3:5 for boys and girls with the number of boys being 18

What we have is thus;

3:5 = 18:g

3/5 = 18/g

3g = 90

g = 90/3

g = 30 girls

Thus, we have 18 boys and 30 girls with a total of 48 students.

The probability that the teacher selects a girl to write the question on the board is 30/48 = 5/8

Now, we intend selecting another girl to answer the question. This is like a probability without replacement. So this means that the number of girls we have now is 29 and the number of students we are selecting from is 47 students

Thus, the probability of selecting a girl to answer the question becomes 29/47

The joint probability is thus; 29/47 * 5/8 = 145/376 = 0.3856

To the nearest thousandth, we have 0.386

5 0
3 years ago
9.
alex41 [277]

Answer:  B. c = 16d + 18

I'm gonna go with c = 16d + 18

Step-by-step explanation:  letter B or letter D

Answer

5.0/5

6

Brainly User

Days : 1    2    3    4 →→→→→→D(X axis)

Rent a Truck:  34   50  66    82→→→→→→R(Y axis)

As  you can observe from number of Days and Amount to rent a truck , if you rent for a day the price being $ 34 and with increase in Day the rent increases by $ 16.

Plotting the point on graph , found that these points are collinear.

So, we can Represent this relation between days and Rent in equation of two variables representing a line.

Two point formula of line:

 →→Equation of line passing through two points  

So , line representing Days and rent is :

So, the rule representing Days and Rent is:  16 D - R + 18=0

...............................................................................................................................................

The answer is 18

If you subtract 47-29=18

Then if you subtract 47-65=18 the pattern is to add 18

7 0
3 years ago
The total cost of buying g pounds of granola for $2.95 per pound and f pound of flour for $9.72 per pound
amm1812

Answer:

2.95g+9.72f=total cost

Step-by-step explanation:


7 0
4 years ago
8x + 4 = 3 (X - 1) + 7
Igoryamba

Answer:

0

Step-by-step explanation:

8x + 4 = 3x - 3 +7

u first expand the bracket as I have done above

then u evaluate those who have like terms close like -3 + 7

8x + 4 = 3x + 4

then u group like terms ie. the values with the variable x on one side of the equation and the ones without x on the other side of the equation

8x - 3x = 4 - 4

8x - 3x = 0

5x = 0

then u divide both side by the coefficient of x

0/5 but any number divided by 0 is 0, so x = 0

8 0
3 years ago
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