3 years ago

Can anyone help with this question? X^2 + 3x-8

Mathematics

1 answer:

lbvjy [14]3 years ago

7 0

Answer:

I recommend trying this it explains it and gives you the answer

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Given that the measurement is in centimeters, find the area of the circle to the nearest tenth. (Use 3.14 for π)

kvv77 [185]

Answer:

Option D) 254.3 cm2

Step-by-step explanation:

we know that

The area of a circle is equal to

$A=\pi r^{2}$

we have

$r=9\ cm$

substitute

$A=(3.14)(9)^{2}=254.3\ cm^2$

7 0

3 years ago

Find inverse of y=1/2x+8

Molodets [167]

F^1(x)=2x-16 To find the interverse interchange the variable and solve for y

8 0

3 years ago

In a metal fabrication process, metal rods are produced to a specified target length of 15 feet. Suppose that the lengths are n

Leto [7]

Answer:

95% Confidence interval: (14.4537 ,15.1463)

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 15 feet

Sample mean, $\bar{x}$ = 14.8 feet

Sample size, n = 16

Alpha, α = 0.05

Sample standard deviation, σ = 0.65 feet

Degree of freedom = n - 1 = 15

95% Confidence interval:

$\bar{x} \pm t_{critical}\displaystyle\frac{s}{\sqrt{n}}$

Putting the values, we get,

$t_{critical}\text{ at degree of freedom 15 and}~\alpha_{0.05} = \pm 2.1314$

$14.8 \pm 2.1314(\dfrac{0.65}{\sqrt{16}} ) \\\\= 14.8 \pm 0.3463 = (14.4537 ,15.1463)$

is the required confidence interval for the true mean length of rods.

3 0

3 years ago

Read 2 more answers

Q8 Q21.) Find the amount invested at each rate.

Pavlova-9 [17]

See the attached picture:

6% = 1200
9% = 2400
12% = 3800

5 0

3 years ago

Read 2 more answers

-(9-15)+(-8+2)-(24-30)=

AleksAgata [21]

The answer is -6
(9-15)=-6
(-8+2)=-6
(24-30)=-6
-(-6)+(-6)-(-6)= -6

3 0

2 years ago