All categories

3 years ago

Can someone pls help me

Mathematics

1 answer:

masya89 [10]3 years ago

3 0

Answer:

141 1/4

Step-by-step explanation:

You are looking for TOTAL change, thus, both values will be positive. In order to add both fractions, you need to convert the denominator for 90 1/2 into a 4. This becomes 90 2/4.

Now add both mixed fractions.

3/4 + 2/4 = 1 1/4

90 + 50 = 140

140 + 1 1/4 = 141 1/4

You might be interested in

Allyson works at Designer Tattoos. Her regular hourly wage is $22.20. If she regularly works 34 hours per week, what is her regu

ExtremeBDS [4]

Answer:

754.80

Step-by-step explanation:

22.20*34=754.80

6 0

3 years ago

Read 2 more answers

The algebraic form of a sequence is 4n+1. write the sequence

diamong [38]

Answer:

5, 9, 13, 17, 21, .....

Step-by-step explanation:

To generate the sequence, substitute n = 1, 2, 3, 4, ..... into the rule

a₁ = 4(1) + 1 = 4 + 1 = 5

a₂ = 4(2) + 1 = 8 + 1 = 9

a₃ = 4(3) + 1 = 12 + 1 = 13

a₄ = 4(4) + 1 = 16 + 1 = 17

a₅ = 4(5) + 1 = 20 + 1 = 21

7 0

3 years ago

Prudence has 12 pairs of gold earrings and 12 pairs of silver earrings in a drawer in her jewelry box. If she randomly pulls six

Gnom [1K]

I think D 3 bc the ratio is 12:12

7 0

3 years ago

A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste

Oxana [17]

Given that X be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02

Part A:

The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

 $P(X)={ ^nC_xp^x(1-p)^{n-x}} \\ \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\ \\ =1(1)(0.98)^{30}=0.5455$


Part B:

The mean of a binomial distribution is given by

 $\mu=np \\ \\ =30(0.02) \\ \\ =0.6$

The standard deviation is given by:

 $\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\ \\ =0.7668$


Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.

5 0

3 years ago

Pls help asap thx alot Find the missing vertical angles

Vladimir79 [104]

Answer:

Vertical angles are congruent, so L3 = 37 degrees, and L4 = 143 degrees.

Let me know if this helps!

6 0

3 years ago