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DanielleElmas [232]
3 years ago
12

40 points if I got these right.

Mathematics
1 answer:
OleMash [197]3 years ago
6 0

x- the number

9x - 4

Four less (-4) than nine times number (9x)

x/4 + 9

Nine more (+9) than one-fourth of number (1/4 x = x/4)

4 - 9x

Four (4) decreased (-) by the product of a number and nine

4x - 9

Nine less (-9) than a four times number (4x)

x/9 + 4

The sum (+) of one-nineth a number (1/9 x = x/9) and four (4)


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Which equation should you solve to find x?
deff fn [24]

Answer: Choice C

sin(26) = x/10

===========================================================

Explanation:

With respect to the 26 degree angle, the x is the opposite side and the 9 is the length of the adjacent side.

We can say tan(26) = x/9 because tangent is the ratio of opposite over adjacent. In other words, tan(angle) = opposite/adjacent

Unfortunately, tan(26) = x/9 is not an answer choice.

Luckily though, we have other trig ratios to work with.

The sine ratio ties together the opposite side and hypotenuse

sin(angle) = opposite/hypotenuse

sin(26) = x/10

---------

Extra info (optional section)

Solving for x leads to...

sin(26) = x/10

10*sin(26) = x

x = 10*sin(26)

x = 4.38371 approximately

Also, note how cos(26) = 0.89879 approximately, which is fairly close to 9/10 = 0.9. This indicates some rounding error is going on when your teacher is displaying either the 9, the 10, or the 26 degree angle.

7 0
3 years ago
which formula can be used to find the measure of angle a. 1/2(a°+b°) b. 1/2(a°-c°) c. 1/2(b°+c°) d. 1/2(a°-b°)
Sholpan [36]

Answer:

d

Step-by-step explanation:

The secant- secant angle 1 is one half the difference of the measures of the intercepted arcs, that is

∠ 1 = \frac{1}{2}(a - b)°

7 0
4 years ago
Absolute cable company bills on a monthly basis. Each bill includes $30.00 service fee plus $4.75 in taxes and $2.99 for each mo
Nutka1998 [239]

cost = 34.75 + 2.99m

where m is the number of movies purchased per month.

If Absolute cable lowers the service fee ($30), how will the expression change?

cost = 30.00 + 4.75 + 2.99m

The 30.00 will be lowered. Therefore, the cost will decrease.

Answer:

The cost [constant] will decrease.

5 0
3 years ago
What’s the answer for 3(4w +5)
boyakko [2]

Answer:

12w+15

Step-by-step explanation:

Distribute 3 to whats inside of parentheses

3*4w=12w

3*5=15

12w+15

7 0
3 years ago
Read 2 more answers
Can you please help with this question
zubka84 [21]

Answer:

all

Step-by-step explanation:

first we can combine 5x and - 2x

5x + -2x = 3x

now we have 3x + 5 > 11

now we can go through all of the numbers to see which numbers make the inequality true

3 yes

3 * 3 = 9

9 + 5 = 14

so all of the numbers make it true

7 0
3 years ago
Read 2 more answers
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