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3 years ago

GIVING BRAINLIEST. A parabola opens to the left. Which could be the equation of the parabola?

Mathematics

1 answer:

GrogVix [38]3 years ago

4 0

D is the answer. That equation is the only one that results in a parabola opening towards the left.

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If you add 21 to my number and then multiply the result by 3, you will get 84 more than two-thirds of my number. Find my number.

Ksivusya [100]

Based on the calculations, the unknown number is equal to $\frac{-45}{7}$

Let the unknown number be x.

<h3>How to find an unknown number:</h3>

Translate the word problem into an algebraic expression, we have;

Adding 21 to the unknown number:

$21 +x$

Multiplying the result by 3:

$3\times (21+x)$

84 more than two-thirds of the unknown number:

$\frac{2x}{3} +84$

Equating the equations, we have:

$3\times (21+x) = \frac{2x}{3} +84\\\\43+3x=\frac{2x}{3} +84$

Cross-multiplying, we have:

$43+3x=\frac{2x}{3} +84\\\\129+9x=2x+84\\\\9x-2x=84-129\\\\7x=-45\\\\x=\frac{-45}{7}$

Read more on word problems here: brainly.com/question/13170908

5 0

2 years ago

What is the length of the diagonal of a 10 cm by 15 cm rectangle?

Archy [21]

The length of the diagonal should be 18 if I am not wrong!

Step-by-step explanation:

a2+ b2=c2

so 10x10+15x15=the diagonal

100+225=325

325 squared = 18

8 0

3 years ago

1 inch on the map represents 8 miles

vovangra [49]

Answer:

What is the question?

Step-by-step explanation:

7 0

3 years ago

A flagpole is 25 feet tall. A rope is tied to the top of the flagpole and secured to the ground 16 feet from the base of the fla

Lerok [7]

As for the drawing, help yourself.

P. theorem -- a^2 + b^2 = c^2
a = 25
b = 16

so 25^2 + 16^2 = c^2
c^2 = 881
c = sqrt881

8 0

3 years ago

How to write x is at most 30

stira [4]

X > 30

anything to ask please pm me

6 0

3 years ago