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Neporo4naja [7]
4 years ago
14

Lydia is taking a test. It has four multiple choice questions, each with three options to choose from, and five True/False quest

ions. If Lydia guesses on each question, what is the probability she will earn 100%
Mathematics
1 answer:
VladimirAG [237]4 years ago
5 0

Answer: 50%

Step-by-step explanation:

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zysi [14]

Answer:

d

Step-by-step explanation:

6 0
3 years ago
Solve each equation<br> a. t+16=7<br> b. w/4=-11<br> c. 81=3(k+7)
Amiraneli [1.4K]

Answer:

sorrry im no good at math but maybe u can use khan academy

Step-by-step explanation:

7 0
3 years ago
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Find the length of AB
Lady_Fox [76]

Hey there! :)

Answer:

arc AB = 2.5π in (in terms of pi) or ≈7.85 in. (pi = 3.14)

Step-by-step explanation:

Begin by finding the circumference of the circle. Use the formula:

C = 2rπ

C = 2(9)π

C = 18π.

Since ∠AQB equals 50°, set up a ratio to find the length of arc AB:

\frac{50}{360}  = \frac{x}{18\pi }

Cross multiply:

50 · 18π = 360x

900π = 360x

Divide both sides by 360:

x = 2.5π in, or ≈7.85 in.

5 0
4 years ago
Elsa invested $500 in a fund for 4 years and was paid simple interest. The total interest that she received on the investment wa
dezoksy [38]

The annual interest rate of her investment would be = 4%

<h3>Calculation of annual interest rate</h3>

The principal amount invested= $500

The period of investment= 4years

The interest received= $80

The interest rate= ?

To calculate the interest rate use the formula,

SI = P×T×R/100

80 = 500 × 4 ×R/100

Make R the subject of formula,

R= 80 ×100/500×4

R= 8000/2000

R= 4%

Therefore, the annual interest rate of her investment would be = 4%.

Learn more about simple interest here:

brainly.com/question/20690803

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8 0
2 years ago
Find the midpoint of the segment with the endpoints: (-4,5) and (7,-9)
il63 [147K]

Answer:

3/2 is the answer for (-4,5)  and -2 for (7,-9)

4 0
3 years ago
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