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Monica [59]
3 years ago
14

Solve this system of linear equations. Separate

Mathematics
1 answer:
Jet001 [13]3 years ago
7 0

Answer:

18x-7y=17

18x=-17+7y

x=-17+7y/18

Step-by-step explanation:

answer=-16.6111111111

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Need help with all of these questions step by step explanation will be appreciated.
pav-90 [236]

Answer: can’t read it

Step-by-step explanation:

i’m sorry I can’t read that

8 0
3 years ago
PLEASE HELP ME WITH THESE<br> ALL WORK IS APPRECIATED!!<br> THANK YOU:)❤️
Vsevolod [243]

3) In Δ BDC

|DC|/|BC| = cos C

cos C= 16/17.89

C= cos⁻¹( 16/17.89)=26.57⁰

In triangle ABC:

x=180-(90+26.57)=63.43

x=63.43

2)

AB/BD= tan(70⁰), AB=BD*tan(70⁰)

AB/BC=tan(40⁰), AB=BC*tan(40⁰)

BD*tan(70⁰)=BC*tan(40⁰)

BD=BC-CD=BC - 15

(BC -15)*tan(70⁰)=BC*tan(40⁰)

BC*tan(70⁰) -15*tan(70⁰)= BC*tan(40⁰)

BC*tan(70⁰) - BC*tan(40⁰) = 15*tan(70⁰)

BC(tan(70⁰)-tan(40⁰))= 15*tan(70⁰)

BC = 15*tan(70⁰)/(tan(70⁰)-tan(40⁰)) = 21.60

BC=21.60

1) In a quadrilateral sum of angles =360⁰.

PQS=SQR=50⁰, because SQ bisects PQR.

Using Law of sine in ΔSRQ

SR/sin ∠SQR = SQ/sinR, SQ = SR * sinR/sin SQR = 3*sin30/sin50 =3.26

SQ=3.26 cm

ΔPQS:

cos PQS= PQ/SQ

PQ=SQ*cosPQS =3.26*cos 50⁰=2.09=2.1

PQ=2.1 cm


3 0
3 years ago
The county park wants to install a circular fence around the sandpit. How much fencing will they need if the diameter of the san
garik1379 [7]

Answer:

157.07963

Step-by-step explanation:

2πr²

2π(5)²

2π(25)

50π

157.07963

4 0
3 years ago
What is 0.564 written in expanded form?
finlep [7]

Answer:

0.5 + 0.06 + 0.004 in expanded form.

Step-by-step explanation:

3 0
3 years ago
Can you help with number 4,5,6,8
aliya0001 [1]
4) 10% or 1/10
5) 24% or 6/25
6) 34% or 17/50
8) 8% of 2/25
6 0
3 years ago
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