What is 12 x 0.65 I am stuck

Mathematics

1 answer:

ANEK [815]2 years ago

3 0

Answer:

7.8

Step-by-step explanation:

If you want to know how to multiply whole numbers by decimals, then just ignore the decimal point and multiply like normal then bring back the decimal point when you have finished

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Matt had 60 questions correct on a Percent's Chapter Test that had 150 one-mark questions.

WARRIOR [948]

60/150 = 40%

Hope this helps :D

7 0

3 years ago

Use the discriminant to describe the roots of each equation. Then select the best description. 2 = x2 + 5x. A) Double root B) Re

fredd [130]

$\bf 2=x^2+5x\implies 0=x^2+5x-2\\\\\\\qquad \qquad \qquad \textit{discriminant of a quadratic}\\\\\\0=\stackrel{\stackrel{a}{\downarrow }}{1}x^2\stackrel{\stackrel{b}{\downarrow }}{+5}x\stackrel{\stackrel{c}{\downarrow }}{-2}~~~~~~~~\stackrel{discriminant}{b^2-4ac}=\begin{cases}0&\textit{one solution}\\positive&\textit{two solutions}\\negative&\textit{no solution}\end{cases}\\\\\\(5)^2-4(1)(-2)\implies 25+8\implies 33$

so we have a 33, namely two real solutions for that quadratic.

usually that number goes into a √, if you have covered the quadratic formula, you'd see it there, namely that'd be equivalent to √(33), now 33 is a prime number, and √(33) is yields an irrational value, specifically because a prime number is indivisible other than by itself or 1.

so 33 can only afford us two real irrational roots.

3 0

2 years ago

If you are buying at item at a store for a price of $17, and there is a 8.7% tax added on top, what would be the total amount du

anyanavicka [17]

Answer:

$18.48

Step-by-step explanation:

To find a percentage you just multiply the amount x the percentage in decimal form.

17 x 0.087 = 1.479 tax

Then you add that number too the original total.

17+1.479 = 18.479