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2 years ago

A swimmer swam 48 kilometers in d days. What is the value of d the swimmer swam an average of average of 3.2 kilometers daily?

Mathematics

1 answer:

Firlakuza [10]2 years ago

6 0

It should be 15 because 48/3.2 is 15 and that means he swam 48 kilometers in 15 days

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Multiply.

sergij07 [2.7K]

Answer:

D) 2x² + 4x - 30

Step-by-step explanation:

Follow the FOIL method:

FOIL =

First

Outside

Inside

Last

...and is the order you multiply to solve:

(x + 5)(2x - 6) =

(x)(2x) = 2x²

(x)(-6) = -6x

(5)(2x) = 10x

(5)(-6) = -30

Combine like terms. Simplify:

2x² -6x + 10x - 30 = 2x² (-6x + 10x) - 30 = 2x² + 4x - 30

2x² + 4x - 30 is your answer.

5 0

3 years ago

Find the selling price $280 tax 5%

Semenov [28]

Answer:

The selling price is $294

Step-by-step explanation:

5/100 (280)

0.05 * 280 = 14

5% of 280 equals 14.

To find the selling price we have to add the tax to the price.

$14 + $280 = $294

<em>The selling price is $294</em>

6 0

2 years ago

The simplified expression

Romashka-Z-Leto [24]

Answer:

$5x^2 y^2$

Step-by-step explanation:

We need to use the properties shown below to solve this:

1. $\sqrt[n]{x^a} =x^{\frac{a}{n}}$

2. $\sqrt{x}\sqrt{x} =x$

3. $\sqrt{x} \sqrt{y}=\sqrt{x*y}$

Area of a triangle is given by 1/2 * base * height, so we do that and simplify:

$A=\frac{1}{2}(\sqrt{5x^3} )(2\sqrt{5xy^4} )\\A=\frac{1}{2}(5x^3)^{\frac{1}{2}}*2*(5xy^4)^{\frac{1}{2}}\\A=\sqrt{5}x^{\frac{3}{2}}*\sqrt{5}\sqrt{x} } y^2\\A=\sqrt{5} \sqrt{5}x^{\frac{3}{2}} x^{\frac{1}{2}}y^2\\A=5*x^2y^2\\A=5x^2 y^2$

6 0

3 years ago

What is 2 x 1 + 2 x 24/4 help I will mark good

Irina-Kira [14]

Answer: 16

Step-by-step explanation:

We follow BIMDAS.

So it becomes :

2+2×24/4 after the first step.

Then, 4+48/4

Then, 4+12

Which is 16

7 0

3 years ago

85% of the students in Yvan’s school walk to school. If 816 students walk to school, how many students are in the school?

storchak [24]

<h2>Hello There today we will solve your problem</h2>

$\huge\red{\mid{\underline{\overline{\textbf{QUESTION}}}\mid}}$

<em>85% of the students in Yvan’s school walk to school. If 816 students walk to school, how many students are in the school?</em>

<em />

<em>Response-</em>

Since we are using percents we can make an equation out of this question

$\frac{85}{100}=\frac{816}{x}$

$\frac{85}{100}$ is the way we write percents in math as a fraction

and $\frac{816}{x}$ is the part and whole you gave us

$\frac{85}{100}=\frac{816}{x}$ cross multiply

$85x=81600\\divide\\x=960$ students are in the school

$\huge\blue{\mid{\fbox{\tt{ANSWER}}\mid}}$

$960$ students at Y'vans school

6 0

2 years ago