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Alexus [3.1K]
2 years ago
14

I don’t know what to do please help

Mathematics
1 answer:
Marrrta [24]2 years ago
4 0

Answer:

cos(A)=√21/5

Step-by-step explanation:

Use the definition of each function as well as the Pythagorean Theorem.

Hope it helps :>

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4. Anna, Beate and Cindy buy a bag of 30 biscuits together. They get 10 biscuits each. But Anna has paid 80 cents, Beate 50 cent
erma4kov [3.2K]

Answer:

  • Option E. 6.

Step-by-step explanation:

<u>80:50:20 or 8:5:2. 8 ÷ 15 * 30 = 16 = 16 - 10 = 6. This is the solution.</u>

  • Option A. 30 + 10 = 40. Incorrect. The solution is unequal to this.
  • Option B. 30 + 9 = 39. Incorrect. The solution is unequal to this.
  • Option C. 30 + 8 = 38. Incorrect. The solution is unequal to this.
  • Option D. 30 + 7 = 37. Incorrect. The solution is unequal to this.
  • Option E. 30 + 6 = 36. Correct. The solution equals this answer.

<u>Option E will be the answer.</u>

6 0
2 years ago
Will the square of a negative number always be positive? Explain why.
qwelly [4]

the square of a negative number always be positive

eg: -2² = -2×-2 = (-×- = +) +4

the cube of a negative number always be positive

eg: -2³ = -2×-2×-2 = (-×-×- = +) -8

hope it helps...!!!

6 0
2 years ago
Read 2 more answers
If f(x) is a linear function, what is the value of n?
lana [24]
The generic equation for a linear function can be expressed in the slope intercept form f(x) = mx + b, where m is the slope and b is the y intercept. For this problem we can first find the equation of the line. Then we substitute x = 7 to get the f(x) value, which is n at the point x = 7.

To find the equation of the linear function we first find the slope. Slope is defined as the change in f(x) divided by the change in x. As we are given a linear function, the slope at every point is the same. We can pick any two points known to find the slope.

Let's pick (3, 7) and (9, 16). The slope m is m = (16-7)/(9-3) = 9/6 = 3/2.

Now that we have the slope, we can plug in the slope and one of the points to find b. Let's use the point (3, 7).
f(x) = mx + b
7 = (1/2)(3) + b
b = 11/2

Now we can write the equation
f(x) = (1/2)x + 11/2

Plugging in x = 7 we find that f(7) = 9. n = 9
4 0
3 years ago
Read 2 more answers
HELP ME PLEASE AND THANKS
gavmur [86]
X is equal to 22.25 so all you have to do is to fill it in and find the answers
8 0
3 years ago
3(3 - 8x) - 1 = -6x - 28
Wewaii [24]

Answer:

x=2

Step-by-step explanation:

3(3 - 8x) - 1 = -6x - 28

Distribute

9 -24x -1 = -6x -28

Combine like terms

8 -24x = -6x -28

Add 24x to each side

8-24x+24x = -6x-28+24x

8 = 18x-28

Add 28 to each side

8+28 = 18x-28+28

36 = 18x

Divide each side by 18

36/18 = 18x/18

2 =x

6 0
3 years ago
Read 2 more answers
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