All categories

3 years ago

Plz help me I am bad at math

Mathematics

2 answers:

KiRa [710]3 years ago

5 0

Answer:

Step-by-step explanation:

lorasvet [3.4K]3 years ago

4 0

C. 52

156-104=52
208-156=52
so there an increment of 52 words per minute meaning the first minute he had to type 52 words

You might be interested in

An ostrich that is 133 inches tall is 18 inches taller than 5 times the height of a kiwi.

PtichkaEL [24]

Answer:

Step-by-step explanation:

133 = 18 + 5x

155 = 5x

23 = x

3 0

3 years ago

Suppose that in a random selection of 100 colored candies, 26% of them are blue. The candy company claims that the percentage

quester [9]

Answer: a) -0.2252, b) 0.8219

Step-by-step explanation:

Since we have given that

Sample size n = 100

Probability that candies are blue = p= 0.26

Probability that company claims that it is blue candy = P = 0.27

So, Q = 1-P= 1-0.27 = 0.73

So, Null hypothesis : $H_0:p=P$

Alternate hypothesis : $H_1:p\neq P$

So, the test statistic would be

$z=\dfrac{p-P}{\sqrt{\dfrac{P.Q}{n}}}\\\\z=\dfrac{0.26-0.27}{\sqrt{\dfrac{0.27\times 0.73}{100}}}\\\\z=-0.2252$

Since α = 0.05

So, critical value of z = 1.96

p-value = P(Z>Z(calculated)

Using the excel function , we get that

$P(z>0.2252)\\\\=2\times 0.410.911845\\\\=0.8219$

Hence, a) -0.2252, b) 0.8219

6 0

3 years ago

Solve the system using elimination.

Whitepunk [10]

5x + 8y = -29
7x - 2y = -67 ..... multiply both sides by 4

5x + 8y = -29
28x - 8y = -268

33x + 0y = -297
x = -9

(-9, 2)

6 0

3 years ago

Read 2 more answers

A window has the shape of a rectangle with a semicircle at the top.

Sidana [21]

Answer:

8+pi/2

Step-by-step explanation:

The area of the rectangle on the bottom is 8, or 2*4. The area of the top is half (because it's a semi circle) of pi*r^2, or just 1/2 pi

7 0

2 years ago

HEELLPP

Lana71 [14]

Answer: 7.8

Step-by-step explanation:

4 0

3 years ago