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3 years ago

Kojo wants to be an author. To improve his writing skills, every day after school he writes 3 pages of a story he is

Mathematics

1 answer:

koban [17]3 years ago

3 0

If the number of days is d and he writes 3 pages for every d, then we can say

3d = 81

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The area of a triangular block is 49 square inches. If the base of the triangle is twice the height, how long are the base and t

andrezito [222]

1) Formula: area = height * base / 2

2) Call x the height:

height = x

base = 2x

3) State the equation:

(x)(2x) = 49 in^2

4) Solve the equation:

2x^2 = 49 in^s

x^2 = (49/2) in^2

x = √(49/2) in

x = 7√2 / 2 in = 3.5 √2 in

5) Solution:

height = 3.5 √2 in and base = 7√2 in

6) Verification: area = (7√2 in) (3.5√2 in) = 49 in^2

Answer: height = 3.5√2 in and base = 7√2 in.

5 0

2 years ago

Assume the readings on thermometers are normally distributed with a mean of 0degreesc and a standard deviation of 1.00degreesc.

Tanzania [10]

Let Z be the reading on thermometer. Z follows Standard Normal distribution with mean μ =0 and standard deviation σ=1

The probability that randomly selected thermometer reads greater than 2.07 is

P(z > 2.07) = 1 -P(z < 2.07)

Using z score table to find probability below z=2.07

P(Z < 2.07) = 0.9808

P(z > 2.07) = 1- 0.9808

P(z > 2.07) = 0.0192

The probability that a randomly selected thermometer reads greater than 2.07 is 0.0192

3 0

3 years ago

True or False: 2(5m-n) is in simplified form?

andriy [413]

Answer:

false

Step-by-step explanation:

7 0

2 years ago

Read 2 more answers

Vichy reads at a constant rate. She can read 5 pages

vagabundo [1.1K]

Answer:

p = (5t)/9

Step-by-step explanation:

9 mins ---------- 5 pages

1 min -------------5/9 page

t mins ------------5/9 x t pages

Thus

p = (5t)/9

7 0

3 years ago

Where to put parentheses on 15\3+2•11 to make the answer 27

Allisa [31]

Answer:

It’s 15/3+(2•11)

Step-by-step explanation:

6 0

3 years ago