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faust18 [17]
3 years ago
15

Pls help will mark brainliest fast.

Mathematics
2 answers:
kvv77 [185]3 years ago
3 0

Answer:

7=857074/5=15/4

Step-by-step explanation:

Mkey [24]3 years ago
3 0

Answer:

B

Step-by-step explanation: -x-10

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3. If triangle ABC has the following measurements, find the measure of angle A.
klio [65]

9514 1404 393

Answer:

  (a)  42.3°

Step-by-step explanation:

Side 'a' is the shortest of three unequal sides, so angle A will be the smallest angle in the triangle. Its measure can be found from the Law of Cosines.

  a² = b² +c² -2bc·cos(A)

  cos(A) = (b² +c² -a²)/(2bc) = (21² +25² -17²)/(2·21·25) = 777/1050

  A = arccos(777/1050) ≈ 42.3°

The measure of angle A is about 42.3°.

_____

<u><em>Additional comment</em></u>

The smallest angle in a triangle can never be greater than 60°. This lets you eliminate choices that exceed that value.

5 0
3 years ago
Need answers to 30 and 31
Mice21 [21]

Answer:

C ; A

Step-by-step explanation:

<u>Question 30:</u>

Perimeter is the sum of all sides.

Perimeter for a recatngle can be found with the formula:

2(L+W)

Length is 7

Width is 4

Plug our values in.

2(7+4)

2(11)

22

Answer C

<u>Question 31:</u>

Circumference of a circle can be found with the formula:

πd.

Diameter of the given circle is 6.

Plug it in

6π

Round π to 3.14

6(3.14)

18.84

Answer A

5 0
3 years ago
-5x+17x=48<br> WILL GIVE BRAINLIST AND THX IF CORRECT
zlopas [31]

Answer:

x=4

Step-by-step explanation:

12x=48

12x/12 =48/12

x=4

7 0
3 years ago
Read 2 more answers
You build and sell toy cars for $36 each. So far, you have built 25 toy cars. How many more toy cars will you have to build and
vovikov84 [41]
You need to build 20 more toy cars
8 0
3 years ago
Read 2 more answers
Rewrite each of the following sentences using logical connectives. Assume that each symbol!, x₀, n, x, B represents some fixed o
katrin [286]

Answer:

a) (f\  has\  a\  relative \ minimum \ at\  x_{0} ) ∧ (f\ is\ differenciable\ at\ x_{0} ) ⇒ f^{'} (x_{0} )=0.

b) (n\ is\ prime) ⇒ (n=2) ∨ (n\  is \ odd).

c) R\ is \ irreflexive\ ⇒ (R\ is\ symmetric) ∧ (R\ is\ transitive).

d) detB=0 ⇒ (B \ is\ square) ∧ (B\ is\ not\ invertible).

e) f\ has\ a\ critical\ point\ at \ x_{0} ⇔ (f^{'}(x_{0})=0) ∨ () \ f^{'}(x_{0}) \ does\ not\ exist.

f) 2n ∨ n>4 ⇒ 2.

g) 6\geq n-3 ⇔ n>4 ∨ n>10.

h) x \ is \ cauchy ⇒ x\ is\ convergent.

i) \lim_{x \to \ x_{0}} f(x)=f(x_{0}) ⇒ f\ is\ continous\  at \ x_{0}.

j) (f\ is\ diferenciable\ at\ x_{0}) ∧ (f\ is\ increasing\ at\ x_{0}) ⇒ f^{'}(x_{0})>0.

8 0
3 years ago
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