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zalisa [80]
2 years ago
7

Lin uses an app to graph the charge on her phone.

Mathematics
2 answers:
exis [7]2 years ago
8 0

Answer:

  • See below

Step-by-step explanation:

<u>Use the graph to answer the following questions:</u>

When did she start using her phone?

  • At 2 afternoon

When did she start charging her phone?

  • At 8 afternoon

While she was using her phone, at what rate was Lin’s phone battery dying?

<u>From 100% to 40% between 2PM and 4 PM:</u>

  • (100 - 40)/(4 - 2) = 60/2 = 30% per hour
klio [65]2 years ago
7 0

Answer:

  • she start using her phone at 2 hours after noon
  • she start charging her phone at 8 hours after noon.
  • rate when Lin’s phone battery dying: \frac{40-100}{4-2} : \frac{-60}{2} : -30%/hr

{ observation from the graph given }

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Mr Langley sold all but 10 of his old computers for R500 each . He received R32 500 from the sale .How many computers did he ori
velikii [3]

Answer:

75 computers

Step-by-step explanation:

R 32500 / R 500= 65 sold

65 +10= 75 computers originally

5 0
3 years ago
In ΔRST, t = 4.1 inches, r = 7.1 inches and ∠S=45°. Find the length of s, to the nearest 10th of an inch.
dem82 [27]

Answer:

The length of s is 5.1 inches to the nearest tenth of an inch

Step-by-step explanation:

In Δ RST

∵ t is the opposite side to ∠T

∵ r is the opposite side to ∠R

∵ s is the opposite side to ∠S

→ To find s let us use the cosine rule

∴ s² = t² + r² - 2 × t × r × cos∠S

∵ t = 4.1 inches, r = 7.1 inches, and m∠S = 45°

→ Substitute them in the rule above

∴ s² = (4.1)² + (7.1)² - 2 × 4.1 × 7.1 × cos(45°)

∴ s² = 16.81 + 50.41 - 41.1677568

∴ s² = 26.0522432

→ Take √ for both sides

∴ s = 5.10413981

→ Round it to the nearest tenth

∴ s = 5.1 inches

∴ The length of s is 5.1 inches to the nearest tenth of an inch

3 0
3 years ago
Read 2 more answers
Three students were given the expression shown to simplify<br><br> 1-8(10x-3)​
madreJ [45]

Answer:

-70x + 21

Step-by-step explanation:

1-8(10x-3)

-7(10x-3)

Use distributive property

-70x + 21

(This is how we learned to do it in my school)

6 0
3 years ago
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Find y<br>Solve the simultaneous <br>equations<br><br><br>3x + 2y = 27 3x - Y = 9<br>​
lutik1710 [3]

Answer:

y = 6

Step-by-step explanation:

To find y, we need to eliminate x in this system of equations:

3\cdot x + 2\cdot y = 27 (1)

3\cdot x - y = 9 (2)

From (1) and (2):

x = \frac{27-2\cdot y}{3}

x = \frac{9+y}{3}

Then, we equalize both expressions and solve for y:

\frac{27-2\cdot y}{3} = \frac{9+y}{3}

27-2\cdot y = 9 + y

3\cdot y = 18

y = 6

6 0
3 years ago
Solve to find the answer of blue pills Mr body took: number of blue pills, b, mr mattics give him was 3 more than the number of
barxatty [35]

Answer:

Mr body took 9 blue pills

Step-by-step explanation:

Total number of pills consumed = 17

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Number of blue pills, b = g + 3

So that,

b = g + 3

11 = g + 3

g = 8

Total number of pills recommended = b + g

                                                            = 11 + 8

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Total number of pills consumed = 17

Thus,

Number of blue pills consumed = 17 - 8

                                                     = 9

Therefore, Mr body took 9 blue pills.

5 0
3 years ago
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