4 years ago

Evaluate -9x+3y+4 for x=5 and y=7

Mathematics

1 answer:

Semmy [17]4 years ago

5 0

Answer:

$\displaystyle -20$

Step-by-step explanation:

$\displaystyle -9[5] + 3[7] + 4 = -45 + 21 + 4 = -20$

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nirvana33 [79]

Answer:

2w+4=35

Explanation:

If we use W as the variable to represent the two bags of equal weight, you would put 2w, which represent the two bags. Since the package is 4 kg, the equation would then become 2w+4=35 as the total weight if the baggage James has is 35 kg if you combine the weight of the package and the checked bags

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3 years ago

Read 2 more answers

How do you prove:<br> csc^<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="754735161a06">[email pro

Elina [12.6K]

$cscx=\frac{1}{sinx};\ sin^2x+cos^2x=1\to cos^2x=1-sin^2x\\----------------------------\\\\csc^2xcos^2x=csc^2x-1\\\\L=csc^2xcos^2x=\frac{1}{sin^2x}\cdot cos^2x=\frac{cos^2x}{sin^2x}\\\\R=csc^2x-1=\frac{1}{sin^2x}-1=\frac{1}{sin^2x}-\frac{sin^2}{sin^2x}=\frac{1-sin^2x}{sin^2x}=\frac{cos^2x}{sin^2x}\\\\\boxed{L=R}$