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Sergeu [11.5K]
3 years ago
5

Can anyone please help me?​

Mathematics
1 answer:
Yanka [14]3 years ago
7 0

Answer:

B.

Step-by-step explanation:

Parentheses mean multiplication in this case. So it would be 2 x -3 OR -3 + -3. When multiplying a negative and a positive the answer will ALWAYS be negative. So you would move to the left on a number line.

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Solve x2 + 8x − 3 = 0 using the completing-the-square method.
ICE Princess25 [194]

Answer:

Step-by-step explanation:

x^2+8x-3=0 (move constant to other side by adding 3 to each side)

x^2+8x=3 (halve thr linear coefficient, square it and add to each side, (8/2)^2=16)

x^2+8x+16=3+16 (now the left side is a perfect square)

(x+4)^2=19 (now take the square root of each side)

x+4=+-(19^(1/2)) (finally subtract the constant to isolate x by itself)

x= -4+-(19^(1/2))

x=negative four plus or minus the square root of nineteen

4 0
3 years ago
Problem 7-35 A satellite range prediction error has the standard normal distribution with mean 0 NM and standard deviation 1 NM.
hammer [34]

Answer:

Kindly check explanation

Step-by-step explanation:

For a normal distribution with :

Mean(m) = 0

Standard deviation (s) = 1

Calculate :

(a) less than 1.17 NM Probability

Zscore = (x - m) / s = (1.17 - 0) / 1 = 1.17

P(z < 1.17) = 0.879

(b) between 1.04 NM and 1.99 NM Probability

Zscore = (x - m) / s = (1.04 - 0) / 1 = 1.04

P(z < 1.04) = 0.8508

Zscore = (x - m) / s = (1.99 - 0) / 1 = 1.99

P(z < 1.99) = 0.9767

(0.9767 - 0.8508) = 0.1259

(c) greater than 0.93 NM Probability

P(Z > 0.93) = 1 - p(Z < 0.93) = 1 - 0.8238 = 0.1762

(d) between 0.24 NM and 0.73 NM Probability

P(Z < 0.24) = 0.5948

P(Z <0.73) = 0.7673

0.7673 - 0.5948 = 0.1725

(e) less than or equal to 2.3 NM Probability

P(Z ≤ 2.3) = 0.9893

(f) greater than 2.22 NM or less than .65 NM

P(Z > 2.22) = 1 - p(Z < 2.22) = 1 - 0.9868 = 0.0132

P(Z < 0.65) = 0.7422

0.7422 - 0.0132 = 0.729

(g) greater than or equal to 2.0 NM Probability

P(Z ≥2) = 1 - p(Z ≤ 2)

1 - 0.97725 = 0.02275

3 0
3 years ago
About 16% of people who get their feet examined are found to have athlete's foot. What is the probability of a podiatrist examin
Olin [163]

Answer:

Step-by-step explanation:

(84/100)^4(16/100)

(0.84)^4(0.16)^1

8 0
3 years ago
PLEASE HURRY AND GET THE ANSWER CORRECT I WILL MARK BRAINLIST
Svetlanka [38]

Answer:

\cfrac{\frac{3}{8} }{\frac{1}{-7} } =\cfrac{3}{8} \times -\cfrac{7}{1}

=\cfrac{-21}{8}

=-2\cfrac{5}{8}

Hope this helps u! :)

5 0
2 years ago
Shady Rivers summer camp has 188 campers this week. If there are 22 campers to each cabin, what is the fewest number of cabins n
Rina8888 [55]

Answer:

they would need 9 cabins 8 of them being completely full the 9th cabin would not be

Step-by-step explanation:

188 / 22 = 8.55

4 0
3 years ago
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