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kykrilka [37]
3 years ago
6

Help Add or subtract a) 2/5+1/5 b) 2/3+5/7 c) 1/9-2/7

Mathematics
2 answers:
Alinara [238K]3 years ago
7 0

Answer:

a. 3/5 b. 29/21 c. -11/63

Step-by-step explanation:

maths

VLD [36.1K]3 years ago
5 0
A) 3/5
b) 29/21
c) -11/63
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Why does this system of equations have infinitely many solutions?
lapo4ka [179]

Step-by-step explanation:

I would say  the one that says after eliminating a variable,the result is x=0

cause the zero can change into any number.

6 0
3 years ago
Which of the following units would be most appropriate to measure the height of a 20-story building?
Over [174]

Answer: it is miles bc centimeters and meters are too small

8 0
3 years ago
) The manager of a local Gap store estimates that on average the probability of a customer entering the store and will purchase
xeze [42]

Answer: 1. 0.0256

2. 0.4096

Step-by-step explanation:

Binomial probability formula , to find the probability of getting x successes:

P(x)=^nC_xp^x(1-p)^{n-x} , where n= Total number of trials

p= Probability of getting success in each trial.

Let x be the number of customers will make purchase.

As per given , we have

p= 0.20

n= 4

1. The probability that 3 of the next 4 customers will make a purchase will be:-

P(x=3)=^4C_3(0.20)^3(1-0.20)^{4-3}

P(x=3)=(4)(0.20)^3(0.80)^{1}\ \ [\because\ ^nC_{n-1}=n]

P(x=3)=(4)(0.008)(0.80)=0.0256

Hence, the probability that 3 of the next 4 customers will make a purchase = 0.0256

2. The probability that none of the next 4 customers will make a purchase will be :

P(x=0)=^4C_0(0.20)^0(1-0.20)^{4-0}

P(x=0)=(1)(0.80)^{4}\ \ [\because\ ^nC_{0}=1]

P(x=0)=0.4096

Hence, the probability that none of the next 4 customers will make a purchase= 0.4096

5 0
3 years ago
What’s the answer pls
larisa [96]
Amount of interest = 3/100 x 1200
= $36

Answer is B
3 0
3 years ago
Petra jogs 5 miles in 40 minutes. At this rate, how long would it take her to jog 7 miles?
Wittaler [7]
(40 min)/(5 mi) = (time)/(7 mi) . . . . . the rates are the same
(7/5)*(40 min) = time = 56 min

At the same rate, it would take Petra 56 minutes to jog 7 miles.
6 0
3 years ago
Read 2 more answers
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