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3 years ago

Solve for x what is x^2-9=55

Mathematics

1 answer:

Readme [11.4K]3 years ago

6 0

x^2-9=55

x^2-9-55=0

x^2-64=0

i would be gratefull if u could give me a brainlesit

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There are 100 tiles that were purchased to raise money for a new playground. The tiles will be laid along a walkway. Each tile i

Aneli [31]

Answer:

<h2>475 inches</h2>

Step-by-step explanation:

You are right

Step one:

we are told that the total number of tiles is 100 in number

since each tile has a lenght of 4.75 inches each

a way to this is to add 4.75+4.75+4.75+...........................<em> in a hundred places to find the lenght.</em>

Step two:

Another way is to multiply 4.75 by 100 which is

=4.75*100= 475 in

<u>Hence the tile will cover 475 inches along the way</u>

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3 years ago

brad and amy typed at the same speed brad typed 292 words in 5 minutes amy typewd d 146 words in 2 minutes

gladu [14]

Answer:

Brad average typing rate in words per minute is 21

1260 divided by 60 = 21

(In case you meant 30 minutes)

1260 divided by 30 = 42

Step-by-step explanation:

In a typing class, the average number N of words per minute typed after t weeks of lessons is

N=157/(1+5.4e^-0.12t)

N=157/(1+5.4e

−

0.12t)

. Find the time necessary to type 75 words per minute

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2 years ago

Sara drives 75km on 5 litres of petrol. How far could she travel on 1 litre?

Katyanochek1 [597]

75 km divided by 5 litres = 14 km
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7 0

3 years ago

Read 2 more answers

Please help out , i’ll mark the brainliest answer

Len [333]

Answer:

Step-by-step explanation:

7) The tangent angles are 90° each.

The angles of a quadrilateral add up to 360°, so ? = 360°-90°-90°-73° = 107°.

8) Solve this the same way as question 7). ? = 360°-90°-90°-57° = 123°.

Questions 9) and 10) are cut off, so I assume you don't need to know those.

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3 years ago

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Ian and his friends are renting a cabin that charges an initial fee plus a rate per night. The relationship between the cost and

Brut [27]

Answer:

Cost per night: 75

Equation: $y = 75x + 50$

Step-by-step explanation:

An equation to represent the situation can be written in the slope-intercept form, $y = mx + b$ , where,

m = slope of the graph, which is the rate per night.

b = y-intercept, which is the initial fee. It is the point where the line intercepts the y-axis.

Let's find m, using two points on the line, (2, 200) and (4, 350)

$slope (m) = \frac{y_2 - y_1}{x_2 - x_1} = \frac{350 - 200}{4 - 2} = \frac{150}{2} = 75$

✅The cost per night = 75

y-intercept, b, = 50. The line intercepts the y-axis at y = 50, when x = 0.

Substitute m = 75, and b = 50 into $y = mx + b$ .

✅The equation would be:

$y = 75x + 50$

6 0

3 years ago