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Katena32 [7]
1 year ago
8

Without multiplying, circle whether eac less than, or equal to the whole numbe 4 X 국 greater than less than equal to

Mathematics
1 answer:
hichkok12 [17]1 year ago
7 0

Given

1. 4 x 1/7

2. 12 x 2 5/6

procedure

4*\frac{1}{7}

1. The answer is 4 x 1/7 is less than 4

12*2\frac{5}{6}>12

2. The answer is 12 x 2 5/6 is greater than 12

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Let sin A= -3/5 with 270°&lt; A&lt; 360°. Find the following.<br> sin A/2
GREYUIT [131]

Answer:

1/sqrt10

Step-by-step explanation:

1) Find out cosA using formula (cosA)^2+(sinA)^2=1

The module of cosA= sqrt (1- (-3/5)^2)= sqrt 16/25=4/5

So cosA=-4/5 or cosA=4/5.

Due to the condition 270degrees< A<360 degrees, 0<cosA<1 that's why cosA=4/5.

2) Find sinA/2 using a formula cosA= 1-2sinA/2*sinA/2 where cosA=4/5.

(sinA/2)^2= 0.1

sinA= sqrt 0.1= 1/ sqrt10 or sinA= - sqrt 0.1= -1/sqrt10

But 270°< A< 360°, then 270/2°<A/2<360/2°

135°<A/2<180°, so sinA/2 must be positive and the only correct answer is

sin A/2= 1/sqrt10

6 0
2 years ago
If 3f(x) - f(1/x) = x^2 , what is the value of f(1/2)?<br>and it's from R-{0} to R obviously.
GarryVolchara [31]

Answer:

0.59375‬

Step-by-step explanation:

3f(x) - f(1/x) = x^2

x = 2:   3f(2) - f(1/2) = 2^2

x = 1/2: 3f(1/2) - f(2) = (1/2)^2

Let a = f(1/2) and b = f(2):

3b - a = 4; 3a - b = 1/4

3b - 4 = a

3(3b-4) - b = 1/4

8b = 12 + 1/4

b = 1.53125‬

3 * 1.53125‬ - 4 = a

a = 0.59375‬

8 0
3 years ago
A person makes 125 grams of butter from 1 liter of milk. How many grams of butter can he make from 5 liters of milk?
Natasha2012 [34]
5 x 125 = 625. He can make 625 grams of butter.
3 0
3 years ago
Read 2 more answers
Hey you, can you help me with this. plz?
weeeeeb [17]

Answer:

again, bruv -_-

7 0
2 years ago
An item that was being sold for $45.00 was raised to $60.00. Find the percent increase in price.
Alexxx [7]

Answer:

u get raised money subtract sold and da answer u get divide wiz raised one and multiply by 100%

4 0
2 years ago
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