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zloy xaker [14]
3 years ago
8

Simplify each each expression. If not possible, write simplified.

Mathematics
1 answer:
Harman [31]3 years ago
6 0
1. 10x
2. 18g
3. 6m
4. 4p
5. -5y
6. 9w
7. c^2+3d
8. 3a^2+2b^2+6a
9. 3x^2+x
10. 16x-y+3
11. 68x^2-34x-1
12. 32
13. 32
14. -9
15. 3m+3n
16. 6x-6y
17. 15f+5
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Vectors! Please help! This is the last question OF MY WHOLE SEMESTER! I've tried it so many times and can't get it right. :(
Feliz [49]

Pictures always help; see the one I've attached for reference.

Call the first vector (from HQ to the supply drop) u and the second vector (from supply drop to medics) v. We then want to find w, the vector from the medics to HQ, which corresponds to the vector -(u + v). (This is because u + v is the vector pointing from HQ to the medics; we're talking about the one in the opposite direction.)

Write the vectors in horizontal/vertical component form:

u = (125 km) (cos 235º x + sin 235º y) = (-71.70 x - 102.39 y) km

v = (75 km) (cos 110º x + sin 110º y) = (-25.65 x + 70.48 y) km

Why these angles?

  • "55 degrees south of west" is 235º; due west is 180º from the positive horizontal axis, and you add 55º to this
  • "20 degrees west of north" is 110º; due north is 90º, so add 20º to this

Add the vectors:

u + v = (-97.35 x - 31.92 y) km

Multiply by -1 to get the vector w:

w = -(u + v) = (97.35 x + 31.92 y) km

The distance covered by this vector is equal to its magnitude:

||w|| = √((97.35 km)^2 + (31.92 km)^2) = 102.45 km

The direction <em>θ</em> is given by

tan<em>θ</em> = (31.92 km)/(97.35 km)  ==>  <em>θ</em> = 18.15º

6 0
3 years ago
Show work whats the answer
padilas [110]
3x+15^2+10= -2
3x+225+10= -2
3x+235= -2
Divide both sides by 3
x+235=0.67
Subtract 235 from both sides
x= -234.33




Sorry, in advance, if I did it wrong.
7 0
3 years ago
Ben, Cam, and Justin are lumberjacks. The number of trees they chop down is given by b + 2 c + 3 j b+2c+3jb, plus, 2, c, plus, 3
ladessa [460]

Consider the complete question is "Ben, Cam, and Justin are lumberjacks. The number of trees they chop down is given by b+2c+3j, where b is the number of hours Ben spends chopping, c is the number of hours Cam spends chopping, and j is the number of hours Justin spends chopping. How many trees do they chop down after Ben spends 8 hours chopping, Cam spends 3 hours chopping, and Justin spends 4 hours chopping?"

Given:

Total number of trees chopped by them = b+2c+3j

b = number of hours Ben spends chopping = 8

c = number of hours Cam spends chopping = 3

j = number of hours Justin spends chopping = 4

To find:

The numerical value of total number of trees chopped by them.

Solution:

Total number of trees chopped by them = b+2c+3j

Put b=8, c=3 and j=4 in the given expression.

Total=8+2(3)+3(4)

Total=8+6+12

Total=26

Therefore, total number of trees chopped by them is 26.

8 0
3 years ago
Find the rule for (3,1) (6,2) (9,3) (12,4) (15,5)<br>​
Varvara68 [4.7K]

Answer:

y = \frac{1}{3} x

Step-by-step explanation:

Compare the values of y with the values of x for each ordered pair

x  y

3  1 → y = 3 ÷ 3

6  2 → y = 6 ÷ 3

9  3 → y = 9 ÷ 3 = 3

12 4 → y = 12 ÷ 3 = 4

15 5 → y = 15 ÷ 3 = 5

The y value in each case is the x value divided by 3

Hence rule is

y = \frac{1}{3} x

8 0
3 years ago
An election ballot asks voters to select four city commissioners from a group of eight candidates. In how many ways can this be​
saul85 [17]
The number of combinations of the 8 candidates taken 4 at a time is:
8C4=\frac{8!}{4!4!}=70\ ways
6 0
3 years ago
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