1 year ago

5 markers cost $6.55.Which equation would help determine the cost of 4 markers?

1 answer:

4 0

5 markers -------> $6.55

4 markers -------> x

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vagabundo [1.1K]

If you look at the picture, you set it up as part over whole is equal to percent over 100. then you just multiply across.

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3 years ago

Lyrx [107]

First you subtract 9x from y and you get 45 - 9x = -y and you don't want negatives so you switch all the signs to get y = -45 + 9x

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3 years ago

Mariulka [41]

Hi there!

The key in the question is "divide". Therefore, we divide 5 by 3

5/3=1.6 pounds

I don't think any of these are right.

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3 years ago

frutty [35]

Answer:

2.45 × $10^{6}$

Step-by-step explanation:

using the rules of exponents

• $\frac{a^{m} }{a^{n} }$ = $a^{(m-n)}$

• $(a^m)^{n}$ = $a^{mn}$

evaluating the numerator

(3.8 × $10^{5}$ )² = 3.8² × $(10^5)^{2}$ = 14.44 × $10^{10}$

R = $\frac{14.44.10^{10} }{5.9.10^{4} }$

= $\frac{14.44}{5.9}$ × $\frac{10^{10} }{10^{4} }$

= 2.45 × $10^{6}$ ← to 2 dec. places

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3 years ago

yulyashka [42]

10x10= 100
10x10x10=1000
100+1000=10,000

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3 years ago