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3 years ago

Can someone answer these please

Mathematics

1 answer:

grandymaker [24]3 years ago

4 0

Answer:

Step-by-step explanation:

A. 3.11

B.7.5

C.6.46

D.133.17

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Distance (km)

Stolb23 [73]

Answer:

good and right and keep trying your best

6 0

2 years ago

What is two numbers whose difference is 25.6

Wewaii [24]

What is two numbers whose difference is 25.6 There are plenty of numbers and digits has a difference of 25.6. we shall illustrate these values using the following.
1. 50.0 – 24.4 = 25.6
2. 100.1 – 74.5 = 25.6 
3. 150 – 124.4 = 25.6 
4. 78 – 52.4 = 25.6 
5. 90 – 64.4 = 25.6 
6. 88.5 -62.9 = 25.6

5 0

3 years ago

HELPPPP THIS IS DUE TODAY plzzzz

professor190 [17]

Answer:

bobby

Step-by-step explanation:

-6 is a greater number for this problem

8 0

3 years ago

A distributor of personal computers has five locations in the city. The sales in units for the first quarter of the year were as

finlep [7]

Answer:

The P-Value is 0.009999

Step-by-step explanation:

we have 5 categories

df=5-1=4

With alpha = 1%, the critical Chi-square value is 13.277

The P-value is define as the shows the degree of inconsistency of our data set with hypothesis.

using a significant level of 0.01,

The P-Value is 0.009999. The result is significant at p <0.01

3 0

3 years ago

Cos pi/4 cos pi/6= 1/2(___pi/12+cos 5pi/12) fill in the blank

inessss [21]

Answer:

$\cos(\frac{\pi}{4})\cos(\frac{\pi}{6})=\frac{1}{2}(\cos(\frac{\pi}{12})+\cos(\frac{5\pi}{12}))$

So the blank is cos.

Step-by-step explanation:

There is an identity for this:

$\cos(a)\cos(b)=\frac{1}{2}(\cos(a+b)+\cos(a-b))$

Let's see if this is fit by your left hand and right hand side:

So $a=\frac{\pi}{4}$ while $b=\frac{pi}{6}$ .

Let's plug these in to the identity above:

$\cos(\frac{\pi}{4})\cos(\frac{\pi}{6})=\frac{1}{2}(\cos(\frac{\pi}{4}+\frac{\pi}{6})+\cos(\frac{\pi}{4}-\frac{\pi}{6}))$

Ok, we definitely have the left hand sides are the same.

Let's see if the right hand sides are the same.

Before we move on let's see if we can find the sum and difference of $\frac{\pi}{4}$ and $\frac{\pi}{6}$ .

We will need a common denominator. How about 12? 12 works because 4 and 6 go into 12. That is 4(3)=12 and 6(2)=12.

$\frac{\pi}{4}+\frac{\pi}{6}=\frac{3\pi}{12}+\frac{2\pi}{12}=\frac{5\pi}{12}$ .

$\frac{\pi}{4}-\frac{\pi}{6}=\frac{3\pi}{12}-\frac{2\pi}{12}=\frac{\pi}{12}$ .

Let's go back to our identity now:

$\cos(\frac{\pi}{4})\cos(\frac{\pi}{6})=\frac{1}{2}(\cos(\frac{\pi}{4}+\frac{\pi}{6})+\cos(\frac{\pi}{4}-\frac{\pi}{6}))$

$\cos(\frac{\pi}{4})\cos(\frac{\pi}{6})=\frac{1}{2}(\cos(\frac{5\pi}{12})+\cos(\frac{\pi}{12}))$

We can rearrange the right hand side inside the ( ) using commutative property of addition:

$\cos(\frac{\pi}{4})\cos(\frac{\pi}{6})=\frac{1}{2}(\cos(\frac{\pi}{12})+\cos(\frac{5\pi}{12}))$

So comparing my left hand side to their left hand side we see that the blank should be cos.

4 0

3 years ago