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Paladinen [302]
3 years ago
12

Find all values of x in the interval [0, 2Ï] that satisfy the equation. (enter your answers as a comma-separated list.) 6 + 3 co

s(2x) = 9 cos(x)
Mathematics
1 answer:
Triss [41]3 years ago
3 0
There are x values. 3 4 5 2
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4. How many numbers of three different digits can be made by using the digits 1, 2, 3, 4,5,6? How many of them are even?​
docker41 [41]

Answer:

Let the 3 digits are xyz.

For x we have 6 options, for y - 5, for z - 4 since all digits are different.

<u>Number of options:</u>

  • 6*5*4 = 120

Even numbers will have z = 2, 4 or 6, then

x - 5 options, y - 4 options

<u>Number of options:</u>

  • 5*4*3 = 60

8 0
3 years ago
What is the sum of 2/5and 2/4
Sergio039 [100]
2\5 + 2\4 Lcm of 4 and 5 is 20 So 20 divided by 5 is 4 × 2 = 8 and 20 divided by 4 is 5 × 2 = 10 10+ 8 =18\20 = 9\10
6 0
4 years ago
please tell me how does 20 times 30 equal 90 please tell me so i can tell my teacher about iready so i dont have to do it
Alja [10]

Answer:

20*30=600

This could be written out with addition instead, as 20 'times' 30

30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30+30

=600

7 0
3 years ago
A scientist mixes water (containing no salt) with a solution that contains 35% salt. She wants to obtain 105 ounces of a mixture
Kaylis [27]

Answer:

90

Step-by-step explanation:

Start with changing 35% and 30% to a decimal.

35% = .35%

30% = .30%

Then multiply 105 by .30%. ( but don't put the percent sign in the calculator when multiplying)

105 x .30% = 31.5

Then you want to divide 31.5 by .35%

31.5 /  .35% = 90

7 0
3 years ago
The cost of building a new house is directly proportional to the number of square feet in the house. If a 1,500-square-foot hous
bezimeni [28]
If you divide 120,000 by 1,500 you will get the amount that it costs per square feet which you would then multiply by 2,400 to get 192,000. So the answer is $192,000
4 0
3 years ago
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