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Akimi4 [234]
3 years ago
14

Help with both of them please! Giving max points.

Mathematics
1 answer:
nikdorinn [45]3 years ago
7 0

Answer: D

Step-by-step explanation:

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a survey was taken of children between the ages 7 and 12. let A be the event that the person rides the bus to school, and let B
son4ous [18]

Answer:

The statement is true about whether A and B are independent eventa is fourth option:

A and B are not independent events because P(A/B)=0.375 and P(A)=0.25

Step-by-step explanation:

Let A be the event that the person rides the bus to school, then:

P(A)=75/300

P(A)=0.25

Let B be the event that the person has 3 or more siblings, then:

P(B)=24/300

P(B)=0.25


P(A/B)=9/24

P(A/B)=0.375


Like P(A/B)=0.375 is different to P(A)=0.25 the events are not independent


Answer. Fourth option:

A and B are not independent events because P(A/B)=0.375 and P(A)=0.25

3 0
2 years ago
Solve for x.
kirill115 [55]

How to get answer:

Expand -2\left(x+13\right)+9x:\quad 7x-26\\Expand -2\left(x+13\right):\quad -2x-26\\\\=-2x-26+9x\\Simplify -2x-26+9x:\quad 7x-26\\7x-26=4\\\mathrm{Add\:}26\mathrm{\:to\:both\:sides}\\7x-26+26=4+26\\\mathrm{Simplify}\\7x=30\\\\\mathrm{Divide\:both\:sides\:by\:}7\\\frac{7x}{7}=\frac{30}{7}\\Simplify\\x=\frac{30}{7}

7 0
3 years ago
Read 2 more answers
the rectangular grassy plot 126 m by 48m has a gravel path 1.5m wide a road 2.5m wide is constructed all around it on inside of
dusya [7]

Answer:

= Sh. 2281.50

Step-by-step explanation:

Area of the path;

(126 × 2.5 ) + (2.5 × (48 - (2.5×2)

= 315 + (2.5 × 43)

= 315 + 107.5

= 422.5 m²

But; the cost of graveling is sh 5.40 per square meter

Therefore; The cost of graveling the whole path;

= 422.5 × 5.40

<u>= Sh. 2281.50</u>

6 0
3 years ago
3. I opened a compound interest account with $300 at 2%. How much money will be in the
MArishka [77]

Answer:

there will be 408$ at the end of 18 months

Step-by-step explanation:

2% of 300 is 6 and 6 x 18 = 108. 108 + 300 = 408

8 0
3 years ago
Read 2 more answers
X+ 0.0825×=216.50 A.) x=2.00 B.) x=20.0 C.) x=200 D.) x=2000
Luden [163]
X+0.0825x=216.5
1.0825x=216.5
x=216.5 / 1.0825
x=200

Answer: C.)  x=200
8 0
3 years ago
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