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alisha [4.7K]
3 years ago
12

Don't know how to find x or z

Mathematics
1 answer:
soldier1979 [14.2K]3 years ago
4 0
....................

You might be interested in
F (x) = -3x+5x^2+8 has blank roots.
defon

Answer:

F (x) = -3x+5x^2+8 has complex roots.

Step-by-step explanation:

number of roots?

ok.

f(x) =   5xx - 3x + 8  =   5xx + 5x  - 8x  + 8   ( I was guessing what numbers would sum to -3)

nope.

ok try discriminant:    (-3)^2 - 4*5 * 8 =   9 - 160  < 0

2 complex roots

7 0
3 years ago
On the basis of extensive tests, the yield point of a particular type of mild steel-reinforcing bar is known to be normally dist
KiRa [710]
1) The formula used for determining the confidence interval is
Sample mean +/- Critical value (or z-score corresponding to 90% confidence) * Standard
error of mean
8439 +/- 1.645 * 100/sqrt 25
8439 +/- 1.645 * 20
8439 +/- 32.9
2) The only difference in this case is finding the critical value i.e., z-score corresponding to 92% confidence which is 1.75 approximately
Then the confidence interval is
8439 +/- 1.75 * 100/sqrt 25
8439 +/- 1.75 * 20
8439 +/- 35
Lower limit is 8439 - 35 = 8404
The upper limit is 8439 + 35 = 8474
6 0
3 years ago
Based on the first two questions, which is larger.. f(n) or f(n-1)?
Darina [25.2K]

i would go with f(n)

7 0
3 years ago
From a hot-air balloon, Madison measures a 36^{\circ}
krek1111 [17]

The balloon’s vertical distance above the ground is 570.3 feet

<h3>Angle of elevation and depression</h3>

Given the following parameters

The angle of depression = 36 degrees

Base distance =  785 feet

<h3>Required</h3>

vertical distance above the ground (H)

Using the SOH CAH TOA identity

tan 36 = H/785
H = 785tan36

H = 570.3 feet

Hence  the balloon’s vertical distance above the ground is 570.3 feet

Learn more on SOH CAH TOA here: brainly.com/question/20734777

3 0
2 years ago
In order to solve the following system of equations by subtraction, which of
PSYCHO15rus [73]

Answer:

option d.

Step-by-step explanation:

<em>Multiply the top equation by 3 and the bottom equation by 4.</em>

7 0
2 years ago
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