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Juli2301 [7.4K]
2 years ago
9

Ill give a brainliest if you can answer all three :))

Mathematics
2 answers:
Pavel [41]2 years ago
6 0

Answer:

4. A

8. D

9. B

Step-by-step explanation:

4. started with 10 points: +10

lost 20 points: -20

won 45 points: +45

10-20+45

8. 11-(-8)

=19

9. 100-(-50)-2

=150-2

=148

PLS GIVE BRAINLIEST

oee [108]2 years ago
5 0

Answer:

4 is A ; 8 is D ; 9 is B

Step-by-step explanation:

PLS GIMME BRAINLIEST

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Find x.<br><br><br><br> 1.5<br> 2<br> <img src="https://tex.z-dn.net/?f=%5Csqrt%7B3%7D" id="TexFormula1" title="\sqrt{3}" alt="\
Vanyuwa [196]

Answer:

1.5

Step-by-step explanation:

3 0
3 years ago
Lots of 40 components each are deemed unacceptable if they contain 3 or more defectives. The procedure for sampling a lot is to
MrRissso [65]

Answer:

The probability of founding exactly one defective item in the sample is P=0.275.

The mean and variance of defective components in the sample are:

\mu=0.375\\\\\sigma^2=0.347

Step-by-step explanation:

In the case we have a lot with 3 defectives components, the proportion of defectives is:

p=3/40=0.075

a) The number of defectives components in the 5-components sample will follow a binomial distribution B(5,0.075).

The probability of having one defective in the sample is:

P(k=5)=\binom{5}{1}p^1(1-p)^4=5*0.075*0.925^4=0.275

b) The mean and variance of defective components in the sample is:

\mu=np=5*0.075=0.375\\\\\sigma^2=npq=5*0.075*0.925=0.347

The Chebyschev's inequality established:

P(|X-\mu|\geq k\sigma)\leq \frac{1}{k^2}

6 0
3 years ago
An orthocenter of a triangle is
Kamila [148]

Answer:

the intersection of the triangle's three altitudes.

Step-by-step explanation:

hope this helped </3

5 0
3 years ago
Someone help? Plz I will give u more points
Rina8888 [55]

Answer:

4.255 ft²

Step-by-step explanation:

the area of the figure =

(2.25 × 1.5)+(1/8 ×3.14× 1.5²)

= 3.375 + 0.88

= 4.255 ft²

6 0
2 years ago
Can someone please solve
pentagon [3]

Answer:

78

Step-by-step explanation:

Evaluate 6 (2 x^2 - 5) where x = -3:

6 (2 x^2 - 5) = 6 (2×(-3)^2 - 5)

Hint: | Evaluate (-3)^2.

(-3)^2 = 9:

6 (2×9 - 5)

Hint: | Multiply 2 and 9 together.

2×9 = 18:

6 (18 - 5)

Hint: | Subtract 5 from 18.

| 1 | 8

- | | 5

| 1 | 3:

6×13

Hint: | Multiply 6 and 13 together.

6×13 = 78:

Answer:  78

7 0
2 years ago
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