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ch4aika [34]
3 years ago
5

8. If you were going to use the quadratic formula to solve the following equation and a = 9, what number would you use as the va

lue for the variable 'b'? 3x + 8 = 9x2 The variable 'b' = ____. (4.0 Points) Part 9 - - 0/1 Answered Questions, 4.0 Points
Mathematics
1 answer:
ludmilkaskok [199]3 years ago
4 0

Answer:

Remember, for solve the quadratic equation

ax^2+bx+c=0

we use the quadratic formula

x=\frac{-b\pm\sqrt{b^2-4ac}}{2a}

We have the equation 3x+8=9x^2 since a must be 9 then we pass the entire left side of the equation to the right side. We get the equation:

3x+8=9x^2\\8=9x^2-3x\\0=9x^2-3x-8

Then, observe that a=9 and b=-3

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Find the area of the triangle with ∠A = 86, b = 4 ft, and c = 3 ft. Round your answer to two decimal places.
Leona [35]
I hope this helps you



Area=1/2.b.c.sinA


Area =1/2.4.3.0,99


Area =5,98
6 0
3 years ago
On the box and whisker plot below, what data calculations do the points B and D represent?
daser333 [38]

Answer:

Lower and upper quartiles

Step-by-step explanation:

The box starts at lower quartile, ends at upper quartile

5 0
3 years ago
5d-2/3c if d =4 and c =3 evaluate fast fast
Mademuasel [1]

Answer:

2

Step-by-step explanation:

Plug 4 in for d and 3 in for c

5d-2/3c

5(4)-2/3(3)

Multiply in the numerator and the denominator

20-2/9

Subtract in the numerator

18/9

2

Hope this helps! :)

4 0
3 years ago
Perform the following computations.You may use13≈0.333333,34= 0.75 and100301= 0.332226.(i). Compute13+34by using five significan
White raven [17]

Answer:

a. 1.0833

Absolute Error = 0.416667

Relative Error = 1.250002

b. 0.0011070

Absolute Error = 0.0011070

Relative Error = 0.003321

Step-by-step explanation:

Given

1/3 = 0.333333

3/4 = 0.75

100/301 = 0.332226

a.

1/3 + 3/4

= 0.333333 + 0.75

= 1.083333

= 1.0833 ------ Approximated to 5 significant digits

Absolute Error = |Real Value - Estimated Value|

Relative Error = Absolute Error/Real Value

Assume 1/3 to be the real value and 3/4 to be the estimated value

Absolute Error = |0.333333 - 0.75|

Absolute Error = |-0.416667|

Absolute Error = 0.416667

Relative Error = 0.416667/0.333333

Relative Error = 1.250002

b.

1/3 - 100/301

= 0.333333 - 0.332226

= 0.001107

= 0.0011070 ----- Approximated to 5 significant digits

Assume 1/3 to be real value and 100/301 to be estimated value

Absolute Error = 0.333333 - 0.332226

Absolute Error = 0.0011070

Relative Error = 0.0011070/0.333333

Relative Error = 0.003321

Absolute and relative errors are approximation errors and they are due to the discrepancy between an exact value and some approximation to them.

The absolute error is the magnitude of the difference between the exact value and the approximation. The relative error is the absolute error divided by the magnitude of the exact value

4 0
3 years ago
Michael is using a number line to evaluate the expression –8 – 3. A number line going from negative 12 to positive 12. A point i
Nata [24]

Answer:

move to the left 3 more spaces

Step-by-step explanation:

you are at -8 already. Therefore, you (-3) more spaces, so you go to the left three more spaces. Use the saying keep change change to help with this.

Keep the first number sign, change the next sign, and the next sign.

6 0
3 years ago
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