MATHEMATICS MIDDLE SCHOOL

Use the law of cosines to find the balue of cos 0 . Round to answer to two decimal places

Answers

Answer 1

Answer:

Answer:

Step-by-step explanation:

Using the law of cosines then cosΘ is the following quotient

cosΘ = $(a^2+b^2-c^2)/(2ab)$

where a = 5.8, b = 10.5 and c = 10.9

cosΘ = $(5.8^2+10.5^2-10.9^2)/(2(5.8)(10.5))$

= $(33.64+110.25-118.81)/(121.8)$

= $(25.08)/(121.8)$ = 0.21 → C

Related Questions

Becca has a biscuit recipe that uses of a tablespoon of salt for every of a cup of flour. In order to have enough biscuits for her family that is visiting, Becca is making a batch of biscuits using 3 cups of flour and how many tablespoons of salt.
A solid right pyramid has a regular hexagonal base with an area of 7.4 units2. The pyramid has a height of 6 units. What is the volume of the pyramid
Factor. m2 + 12m+36
The surface area for a rectangular prism with a square base is given by the expression. 2s2+4sh, where side s is side length of the
13. On a camping trip, you decide to hang your backpack from a rope stretchedbetween two trees, so bears can't steal your food while you sleep. The trees are 20feet apart, and the rope is tied to each tree at a spot 12 feet above the ground. Whenyou hang your backpack on the rope, the weight of the pack pulls the rope down alittle each side of the rope now makes an angle of 15 degrees with the horizontal.That night, a bear comes into your camp and tries to get your backpack with thefood in it. Standing on its back legs, the bear can reach 8 feet into the air. Is yourstuff safe? (Your backpack is two feet long.)

Hugo paid $4.50 for 6 books, if he paid $6.00 how many books did he get?

Answers

Answer:

Hugo got 8 books.

Step-by-step explanation:

Divide 4.50 by 6 to get the unit price. The unit price is $0.75. So add 4.50+.75=5.25 (7 books) and then 5.25+.75=6.00(8 books).

Hope it helps!

Hugo got 8 books. And the rate is $.75 per book

Which ordered pair is the vertex of y= -|X+4|

Answers

y = -|x + 4|

The coordinates of vertex of that function is (x; 0).

-|x + 4| = 0

|x + 4| = 0 ⇔ x + 4 = 0 |-4

x = -4

Answer: (-4; 0)

3x+y=15 5x-4y=8

resolucion de sistema por el metodo de sustitucion

Answers

Answer:

x=4

y=3

Step-by-step explanation:

we have the following equations

3x+y=15 equation 1

5x-4y=8 equation 2

using equation 1 we have:

y=15-3x equation 3

using equation 3 in equation 2 we have:

5x-4(15-3x)=8

5x-4*15+4*3x =8

5x-60+12x = 8

17x=68

x=68/17

so we have x=4

finally in equation 3:

y = 15-3(4)

y = 15-12

y = 3

I need the inequality answer.florence wants to buy onions and doesn't want to spend no more than $3. Can she buy 2.5 pounds ? They are 1.25 pound

Answers

No because if you divide 1.25 by two to find out what the half is in 2.5, it would be .62… and since she wants to buy 2.5 pounds, you've already figured out the .5, so 1.25x2 + .62, it would be 3.12.
Illusion103

No
Do a proportion
1.25 over 1 = x over 3
You would get 3.75

Multiply.
(v+8)(v-8)
simplify

Answers

v * v = v^2
v * -8 = -8v
8 * v = 8v
8 * -8 = -64

v^2 - 8v + 8v - 64
v^2 - 64

This was using the distributive property or using the FOIL method

Need help with this question

Answers

The answer is y = 5.5x + -52

I know I’m late and sorry but the answer is 5.5x+-52

Other Questions

greta made a desing with squares she colored 8 out of the 12 squares blue what fraction of the squares did she color blue

If 80% of a number is 120, what is the number?A.24B.96C.150D.270

Numbers to the power of a fraction help pls

If the price of a purse increased from $45 to $54, what was the percent of increased