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12345 [234]
3 years ago
15

What is 45+(-15) +7

Mathematics
1 answer:
Fed [463]3 years ago
5 0

45+(-15) +7

The answer is 37

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How do you solve this 2 step equation: 8+b/-4=5
Delicious77 [7]
I'm going to rewrite the equation assuming this is the correct form:
8 - \frac{b}{4} = 5
\newline
-8 + 8 - \frac{b}{4} = 5 - 8
\newline
(-4)\cdot -\frac{b}{4} = -3 \cdot (-4)
\newline
b = -12
3 0
3 years ago
World problem in length (trigonometry) geometry not chemistry
lions [1.4K]

Answer:

≈ 47.2 m

Step-by-step explanation:

let the height from the sea to the base of lighthouse be h₁

let the height from the sea to the top of the lighthouse be h₂

using the tangent ratio in the right triangle

tan55.1° = \frac{opposite}{adjacent} = \frac{h_{1} }{610} ( multiply both sides by 610 )

h₁ = 610 tan55.1°

tan56.5° = \frac{h_{2} }{610} ( multiply both sides by 610 )

h₂ = 610 tan56.5°

then

height of lighthouse = h₂ - h₁        

                                  = 610 tan56.5° - 610 tan55.1°

                                  = 610(tan56.5° - tan55.1° )

                                 ≈ 47.2 m ( to the nearest tenth )

6 0
2 years ago
Helppppppppp;pppp]ppp
krok68 [10]

Answer:

315 people bought tickets.

Step-by-step explanation:

270 divided by 6 = 45

45 x 7 = 315

7 0
3 years ago
Read 2 more answers
Lin is reading a 47-page book. She read the first 20 pages in 35 minutes. Rounding to the nearest minute, how long will it take
Kruka [31]

Answer: 82.25 minutes

Step-by-step explanation:

First convert the minutes she took to hours. This would be:

= 35/60

She is reading at a speed of 20 pages per 35/60 hours.

To finish 47 pages therefore, she will take:

= (47 * 35/60) / 20

= 1.37083 hours

Converted to minutes that would be:

= 1.37083 * 60 mins

= 82.25 minutes

7 0
3 years ago
I need help with this one
Paha777 [63]

Step-by-step explanation:

first lets do the bottom rectangular prism

v = l * w * h

l = 9

w = 3

h = 3

can you work out the volume and answer in the comments

8 0
2 years ago
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