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4 years ago

Sally bought a sweater on sale. The sweater is marked down 25% off the original price.,

Mathematics

1 answer:

aleksklad [387]4 years ago

7 0

Answer:

10$

Step-by-step explanation:

We would take the 7.50 divided by 3 which would give us 2.50 which than means 2.50 is 25% of what was taken of by the 25%, we would than add the 2.50$ taken off by the discount which gives us an original price of 10$

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Solve the system by using elimination 3x+3y=-9 3x-3y=21

e-lub [12.9K]

Answer:

y=-5

x=2

Step-by-step explanation:

3x + 3y=-9

3x - 3y=21

0+6y=-30

6y=-30

y=-5

3x-15=-9

x=2

3 0

4 years ago

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What is the solution to x+1<9

Lostsunrise [7]

Answer:

$x$

Step-by-step explanation:

All that we have to do is the inverse, so we will subtract 1 on both sides.

$x+1$

So the answer is anything less than 8.

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3 years ago

What is the value of x?

Alik [6]

Answer:

$x=93$

Step-by-step explanation:

Use the exterior angle theorem of a triangle.

According to this theorem; an exterior angle $x$ is equal to the sum of the two opposite interior angles (35+58).

$x=35 +58$

Simplify;

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3 years ago

Are the ratios 14:18 and 7:9 equivalent

Pepsi [2]

Answer:

Yes

Step-by-step explanation:

14/18 equals 7/9

Dividing by two on the first ratio makes:

7/9 equals 7/9

4 0

3 years ago

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What are the zeros of the function f(x) = x2 + 5x + 5 written in simplest radical form?

Pavel [41]

$\boxed{x_{1}=\frac{-5 + \sqrt{5}}{2}} \\ \\ \\ \boxed{x_{2}=\frac{-5 - \sqrt{5}}{2}}$

<h2>Explanation:</h2>

Using the quadratic formula:

$x=\frac{-b \pm \sqrt{b^2-4ac}}{2a} \\ \\ \\ Here: \\ \\ f(x) = x^2 + 5x + 5 \\ \\ \\ So: \\ \\ a=1 \\ \\ b=5 \\ \\ c=5 \\ \\ \\ x=\frac{-5 \pm \sqrt{5^2-4(1)(5)}}{2(1)} \\ \\ x=\frac{-5 \pm \sqrt{25-20}}{2} \\ \\ x=\frac{-5 \pm \sqrt{5}}{2} \\ \\ \\ Two \ solutions: \\ \\ \boxed{x_{1}=\frac{-5 + \sqrt{5}}{2}} \\ \\ \\ \boxed{x_{2}=\frac{-5 - \sqrt{5}}{2}}$

<h2>Learn more:</h2>

Quadratic functions: brainly.com/question/12164750

#LearnWithBrainly

8 0

3 years ago