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3 years ago

30% ofwhat number is 21.3

Mathematics

2 answers:

Shtirlitz [24]3 years ago

5 0

6.39 is 30% of 21.3. the other 70% ( left over) is 14.91

bearhunter [10]3 years ago

4 0

(x)(.30) = 21.3

x = 21.3 / .30

x = 71

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2(x)+2(2)=2(x/2)-2(x) Solve this please and show the steps!!!!!!

Olin [163]

Answer: $x=-\frac{4}{3}$

Step-by-step explanation:

$2(x)+2(2)=2(\frac{x}{2})-2(x)$

Remove all those parentheses by multiplying. Note: 2 and 2 cancel out.

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$4=x-2x-2x$

Combine like terms;

$4=-3x$

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Rewriting it;

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3 years ago

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Evaluate t-7 for t =20

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Need help for question 8 and 9. I need the equation that’s passes through the points!

dsp73

Answer:

Step-by-step explanation:

Question 8

Let the equation of a line passing through two points $(x_1,y_1)$ and $(x_2,y_2)$ is given by,

y = mx + b

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Since, m = $\frac{y_2-y_1}{x_2-x_1}$

For two points (1, 4) and (5, 8),

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4 = 1 + b

b = 3

Therefore, equation of the line will be,

y = x + 3

Question 9

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m = $\frac{10-4}{2-6}$

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y = $-\frac{3}{2}x+b$

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Therefore, equation of the line will be,

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3 years ago