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2 years ago

Please help ill give brainliest and 5 stars

Mathematics

1 answer:

grandymaker [24]2 years ago

7 0

Answer:

that looks like it should be C

Step-by-step explanation:

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Help!! help!! help!! help!! help!! help!! help!! help!! help!!

oksian1 [2.3K]

Answer:

Step-by-step explanation:

Given the simultaneous equation;

$\frac{a}{b} - \frac{b}{2} = 10\\a - b = 29$

From 2;

a = 29 + b ....3

Substitute 3 into 1;

$\frac{29+b}{b} - \frac{b}{2} = 10\\\frac{2(29+b)-b^2}{2b} = 10\\\frac{58+2b-b^2}{2b} = 10\\58+2b-b^2 = 20b\\b^2-2b-58 = -20b\\b^2-2b+20b -58 = 0\\b^2+18b-58 = 0\\$

Factorize

b = -18±√18²-4(-58)/2

b = -18±√324+232/2

b = -18±√556/2

b = -18±23.58/2

b = -18-23.58/2 and -18+23.58/2

b = -41.58/2 and 5.58/2

b = -20.79 and 2.79

Since a = 29 + b

when b = -20.79

a = 29 - 20.79

a = 8.21

<em>Hence the solution to the system of equation is (8.21, -20.79)</em>

7 0

2 years ago

If cos(-ϴ)=0.95, find sin(π/2-ϴ)

Furkat [3]

$\bf \textit{Cofunction Identities}
\\\\
sin\left(\frac{\pi}{2}-\theta\right)=cos(\theta)
\qquad 
cos\left(\frac{\pi}{2}-\theta\right)=sin(\theta)
\\\\\\
\stackrel{\textit{symmetry identities}}{cos(-\theta )=cos(\theta )}\\\\
-------------------------------\\\\
sin\left(\frac{\pi}{2}-\theta\right)=cos(\theta)=cos(-\theta )=0.95$

6 0

2 years ago

Can someone help me pls on this question pls

jekas [21]

C is the answer of this problem

3 0

2 years ago

1-73.

cricket20 [7]

36inch - 2 feet

72inch - 4 feet

144inch - 8 feet

18 X 2 = 36

1 + 1 = 2

18 x 4 = 72

1 x 4 = 4

18 x 8 = 144

1 x 8 = 8

8 0

2 years ago

What is the scale factor?

muminat

Answer:a scale facter is a scale of how much is one each side or corner and the shape

Step-by-step explanation:

6 0

2 years ago