3 years ago

1. Delia brushes her teeth hour each day.

Mathematics

1 answer:

Lapatulllka [165]3 years ago

8 0

Answer:

part A. 7

Part B. 420

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Solve 5r2 – 12 = 68. {±4} {±5} {±3} {±6}

sashaice [31]

Hey there!

Assuming you meant

$5r^2 - 12 = 68$

If so, follow these steps so it can be a little bit easier to solve

Firstly, we have to $add$ by $12$ on each of your sides

$5r^2 -12 +12 \\ \\ 68 + 12$

$5r^2 = 5r^2 \\ \\ 68 + 12 = 80$

We get: $5r^2 =80$

Now, we have $divide$ by $5$ on each of your sides

$\frac{5r^2}{5} = \frac{80}{5}$

$\frac{80}{5} = 16$

We get: $r^2 = 16$

$r =$ ± $\sqrt{16}$

Therefore , your answer is: $r =$ ± $4$

Good luck on your assignment and enjoy your day!

~ $LoveYourselfFirst:)$

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sladkih [1.3K]

Answer:

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Step-by-step explanation:

$\frac{1}{3} a = - 5 \\ \\ a = - 5 \times 3 \\ \\ a = - 15$

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frozen [14]

1/32 maybe................

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Lucia hit a golf ball 240 feet. How many yards did she hit the ball?

Svet_ta [14]

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Step-by-step explanation:

There are 3 feet in a yard, therefore you take 240 feet divided by 3 to get how many yards there are, and in your case it is 80 yards.

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