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3 years ago

Help me please!! thank you!

Mathematics

1 answer:

pychu [463]3 years ago

6 0

Answer:

45.5cm

Step-by-step explanation:

70/20 = 3.5cm per book

20- 7 = 13

13 x 3.5 = 45.5cm

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7x 1 1/5 enter answer as a mixed number

Leno4ka [110]

The answer is

$8 \frac{2}{5}$

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2 years ago

Question 10 of 25

vlabodo [156]

Answer:

0.5*13*15 = 97.5 square units

Step-by-step explanation:

If the diagonals of the rhombus are 13 and 15 then its area is 0.5*13*15 = 97.5 square units

8 0

3 years ago

Which equation can be used to find the answer? Sharifa spends $51 on the first day of her vacation. This leaves her with $127 to

Dima020 [189]

<span>The answer to this problem is B. t – 51 = 127 t = 178 $178.</span>

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3 years ago

Type the correct answer in the box.

Pepsi [2]

Answer:

f(g(-64)) = -190

Step-by-step explanation:

The functions are not well written.

Let us assume;

f(x) = x+1

g(x) = 3x+1

f(g(x)) = f(3x+1)

Replace x with 3x+1 in f(x)

f(g(x)) = (3x+1) + 1

f(g(x)) = 3x + 2

f(g(-64)) = 3(-64) + 2

f(g(-64)) = -192+2

f(g(-64)) = -190

<em>Note that the functions are assumed but same method can be employed when calculating composite functions</em>

8 0

2 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