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erastova [34]
3 years ago
10

What is -3/4 + 2 3/4​

Mathematics
1 answer:
cestrela7 [59]3 years ago
6 0
The answer to this equation will be 2.
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A spring has natural length 20 cm. Compare the work W1 done in stretching the spring from 20 cm to 30 cm with the work W2 done i
sashaice [31]

Answer:

W1 = W2 = 50k Joules (assuming W1 and W2 have the same force constant, k)

W1 - W2 = 0

Step-by-step explanation:

Work done in stretching a spring is given by 1/2ke^2

Where, k is force constant and e is extension

e1 = 30cm - 20cm = 10cm

W1 = 1/2k(e1)^2 = 1/2×k×10^2 = 50k Joules

e2 = 40cm - 30cm = 10cm

W2 = 1/2k(e2)^2 = 1/2×k×10^2 = 50k Joules

W1 = W2 = 50k Joules provided W1 and W2 have equal force constant

Therefore, W1 - W2 = 0

7 0
3 years ago
Find the GCF of 14a and 28ab
raketka [301]
The GCF would be 14a, because 14a x 1 = 14a, and 14a x 2b = 28ab.
8 0
3 years ago
Will give brainliest
tresset_1 [31]

4=76

4=76

4=76

2=38

TOTAL=266 cars

4 0
3 years ago
Tests for tuberculosis like all other diagnostic tests are not perfect. QFT-G is one of such tests for tuberculosis. Suppose tha
Sauron [17]

Answer:

the probability of an adult getting a NEG result and truly having tuberculosis is 0.0127

Step-by-step explanation:

S = the adult really has tuberculosis.

S' = complement of S = the adult does not has tuberculosis.

POS = the test gives a positive result

P(S)= 0.05

P(POS | S)=0.746

P(NEG | S')= 0.7653

this is an intersection because the "and" word

P(NEG ∩ S) =  P(NEG| S)*P(S)=(1-P(POS | S))*P(S)=(1-0.746)*0.05=0.0127

6 0
3 years ago
Solve 5 |x + 3| – 12 < 13.
Morgarella [4.7K]

Answer:

x<2 and x> -8

Step-by-step explanation:

8 0
3 years ago
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