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2 years ago

12

You want to buy a phone that costs $500. You already saved $100, and you plan to save $40 every week. How many weeks would it ta

ke to meet your goal of $500?

2 answers:

Brut [27]2 years ago

8 0

10 weeks to get 500 dollars

rodikova [14]2 years ago

7 0

Answer:

it will take you 10 weeks to get to $500

Step-by-step explanation:

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What’s the distance formula

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Step-by-step explanation:

$\text{Let}\ A(x_1,\ y_1)\ \text{and}\ B(x_2,\ y_2).\ \text{Then the distance between}\ A\ \text{and}\ B\ \text{is:}\\\\|AB|=\sqrt{(x_2-x_1)^2+(y_2-y1)^2}\\\\Example:\\\\A(2,\ 5),\ B(-1,\ 1)\\\\|AB|=\sqrt{(-1-2)^2+(1-5)^2}=\sqrt{(-3)^2+(-4)^2}=\sqrt{9+16}=\sqrt{25}=5$

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2 years ago

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There are 70 marbles in the bag. The bag has 39 green? marbles, 24 red? marbles, and 7 yellow marbles. Sasha selects a marble fr

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14/20

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The theoretical probability is based on the chance that Sasha will get a yellow marble, 7/70, is from the amount of marbles in the bag of yellow colour.

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3 years ago

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2 years ago

My brother is currently three times as old as me, but in five years, my brother

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Answer: Your brother is 15 years old right now.

Step-by-step explanation:

Let be "m" your currently age and "b" your brother's currently age.

Knowing that right now he is three times (this indicates multiplication) as old as you, you can write the following equation:

$b=3m$

In five years your age will be:

$m+5$

And your brother's age will be:

$b+5$

Then, if in five years, your brother will be twice as old as you, you can set up the second equation:

$b+5=2(m+5)$

Then, the System of equations is:

$\left \{ {{b=3m} \atop {b+5=2(m+5)}} \right.$

Apply the Substitution method and substitute the first equation into the second one and solve for "m":

$3m+5=2(m+5)\\\\3m+5=2m+10\\\\m=10-5\\\\m=5$

Substitute the value of "m" into the first equation and evaluate in order to find "b":

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3 years ago