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3 years ago

Solve for x....................

Mathematics

2 answers:

Elodia [21]3 years ago

8 0

Answer:

The answer is A

Step-by-step explanation:

...Im not rlly that useful rn, sorry...!

I have a TI-84 graphing calculator that has a polynomial app solver on it, and i often use that since im not in algebra anymore. (i forgot how to do decomposition)--->

I do know you must use decomposition for this, or you can use the quadratic formula to substitute.

quadratic formula:

Aleks04 [339]3 years ago

6 0

Answer:

Option A , x = 7/5 and x= -1

Step-by-step explanation:

Formula: Let ax² + bx + c = 0 be the quadratic equation,

x = [-b±√(b²-4ac)]/2a

The given quadratic equation be

5x² -2x = 7

⇒ 5x² -2x - 7 = 0

a = 5, b = -2 and c = -7

Therefore x =[-b±√(b²-4ac)]/2a

x=[-(-2) ±

√((-2)²-4*5*(-7))]/2*5

x =[2 ± √144)]/10

x =[2 ± 12)]/10

x = (2+12)/10 and x = (2-12)/10

x = 14/10 = 7/5 and x= -12/10 = -1

Therefore,the correct answer is Option A , x = 7/5 and x= -1

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Solve

Romashka-Z-Leto [24]

Answer:

Step-by-step explanation:

Ix-4I+3=3

subtracting 3 from both sides (*as per general practice in equations unknown are on one side and constants on the other side or simply taking 3 to other side of the equation)

Ix-4I+3-3=3-3

Ix-4I=0

x-4=0

x-4+4=0=4

x=4

checking:

I4-4I+3=3

I0I+3=3

3=3

8 0

3 years ago

I'm giving brainliest to the most helpful answer. For 50 points:

Alenkinab [10]

Answer:

1) $\displaystyle\frac{5}{18}\approx27.78\%$

2) $\displaystyle\frac{4}{7}\approx57.14\%$

3) $\displaystyle \frac{13}{16}=81.25\%$

Step-by-step explanation:

We are given a two-way frequency table. Using the table, we will determine the probability for each case.

Question 1)

P(A Student With A Part Time Job Without A Car)

Using the first column, the total number of students that have a part time job is 78+30=108.

Likewise, using the first column, we can see that out of those 108 students, 30 do not have a car.

Hence, the probability that a student with a part time job without a car is:

$\displaystyle P=\frac{30}{108}=\frac{5}{18}\approx27.78\%$

Question 2)

P(No Car | Does Not Have A Part Time Job)

Remember that the vertical line means conditional probability.

So, we want the probability of a student having no car given that they do not have a part time job.

Using the second column, we can see that the total number of students that do not have a part time job is 18+24=42.

Likewise, using the second column, 24 do not have a car.

Hence, the probability that a student with a part time job without a car is:

$\displaystyle P=\frac{24}{42}=\frac{4}{7}\approx57.14\%$

Question 3)

P(Part Time Job | Car)

So, we want to probability of a student having a part time job given that they have a car.

Using the first row, the total students that have a car is 78+18=96.

And of those 96 students, 78 have a part time job.

Hence, the probability that a student with a car has a part time job is given by:

$\displaystyle P=\frac{78}{96}=\frac{13}{16}=81.25\%$

4 0

3 years ago

What is the multiplicative inverse of -1/9?

Art [367]

9/-1.........................

6 0

3 years ago

A triangle has side lengths of 24 in., 32 in., and 40 in. Is the triangle acute, obtuse, or right? A) right. B) obtuse. C) acute

Feliz [49]

24, 32 , 40. Divide through by 8

3, 4, 5,

The 3 , 4, 5 reminds of the Pythagorean triple, which is a right angled triangle.

So a triangle with sides 24, 32, 40 is a right angled triangle.

Option A.

8 0

3 years ago

Read 2 more answers

Solve 5t < -15 T< 3 T< -3 T> 3 T > -3

OLga [1]

Answer:

Step-by-step explanation:

5t < -15 (divide by 5 on each side)

t < -3

7 0

3 years ago

Read 2 more answers