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sdas [7]
3 years ago
6

Send help lol. no idea where to even start

Mathematics
1 answer:
Step2247 [10]3 years ago
4 0
What is your question???
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Solve the system of equations
Blababa [14]

Answer:

x = 3

y = 1

Step-by-step explanation:

(2x + 4y = 10) * 2 = (4x + 8y =20)

4x = 20 - 8y

Plug that into the other equation

(20 - 8y) - y = 11

-9y = -9

y = 1

Plug this value into one of the original equations

2x + 4(1) = 10

2x = 6

x = 3

3 0
3 years ago
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Find a. Round to the nearest tenth:
Ulleksa [173]

Step-by-step explanation:

In the following triangle, a= ? , b= 2cm.

m<B= 105° , m<C = 15° ,m< A =?

Now, we know that sum of the interior angles of the triangle = 180°

m<B+m<C +m< A =180°

105°+15°+m< A=180°

m< A= 180- 120° = 60°

\frac{ \sin( A) }{a}  =  \frac{ \sin(B) }{b}

\frac{ \sin(60) }{a}  =  \frac{ \sin(105) }{2}

a =  \frac{ \sin(60) }{ \sin(105) }  \times 2

a = 1.79

a = 1.8

6 0
3 years ago
help please, I have to do it before my class starts its at 10:25 and its 6:21 rn so :) I'm trying to get it done tyyyy
Radda [10]
Ii is the top left and iv is bottom right
7 0
3 years ago
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-5(n - 5) -5 what is the n?
scoray [572]

Answer:

-5 x (4-n)

Step-by-step explanation:

6 0
3 years ago
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In a standard normal distribution, about _________% of the scores fall above a z-score of 3.00
Katarina [22]

The normal rule to remember is 68-95-99.7, i.e. plus or minus three sigma corresponds to 99.7% of the probability. That leaves 0.3% in the two tails, or 0.15% in the tail above 3 sigma.

Answer: 0.15%


7 0
3 years ago
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