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marysya [2.9K]
2 years ago
11

Don't know this please me

Mathematics
1 answer:
bija089 [108]2 years ago
8 0

Answer:

c

Step-by-step explanation:

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Find x from given equations sin30 + 2 cot^2 30 + x cos^2 30= 8+ tan^2 45 + cos 60​
julia-pushkina [17]

Answer

1/2+2×(sqrt3)^2+x.(sqrt3/2)^2=8+1^2+1/2

1/2+2×3+x.3/4=8+1+1/2

1/2-1/2+6+x.3/4=9

x.3/4=9-6

x.3×4=3

x.3=3×4

x.3=12

x=12/3

x=4.

so, the value of x is 4.

hope it helps you.

4 0
3 years ago
Need help plsss give you brainliest plssss help me it’s rounding money cents, dime and dollar
Vladimir [108]

Answer:

Please see the attached image for solution.

Step-by-step explanation:

Cent:  Rounding to the nearest cent or multiple of 0.01.

Dime: Rounding to the nearest 10 cents or multiple of 0.10.

Dollar: Rounding to the nearest dollar or multiples of 1.

For example, in question #21:

To round $12.3456 to the nearest cent:  you must look at the hundredths place, and pay attention to the digit to its right. In this case, the digit at the hundredths place is 4, and to its right is 5. Therefore, you must round it up to 5, making it $12.3<u>5</u>.

To round $12.3456 to the nearest dime:  you must look at the tenths place, and pay attention to the digit to its right. In this case, the digit at the tenths place is 3, and to its right is 4. Since 4 is less than 5, you must round 4 down to 0, making it into $12.<u>3</u>0.

To round $12.3456 to the nearest dollar:  you must look at the ones place, and pay attention to the digit to its right. In this case, the digit at the ones place is 2, and to its right is 3. Since 3 is less than 5, you must round 3 down to 0, making it into $1<u>2</u>.00.

5 0
3 years ago
ANSWER ILL GIVE EXTRA POINTS ⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️⭐️
ExtremeBDS [4]

Answer:

  D.  2 ≤ x ≤ 10

Step-by-step explanation:

The domain is the horizontal extent of the graph. This graph extends from x=2 to x=10. Its domain is ...

  2 ≤ x ≤ 10

4 0
3 years ago
What is the image of (8,1) after a reflection over the y-axis
AysviL [449]

Answer: -8, 1

Step-by-step explanation: on the y axis you go to where the side is opposite so in this case 8,1 in on the right do u go to the left of the y axis and the is a negative x axis and positive y so u get -8,1

7 0
3 years ago
Factor completely: 3x^3+33x^2+54x=0
kap26 [50]

Answer:

3(x + 9)(x + 2)x = 0

Step-by-step explanation:

xv1 = −9

xv2 = −2

xv3 = 0

7 0
2 years ago
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