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4 years ago

Write an expression for the calculation “the product of 4 and 4 added to double the number 5”

Mathematics

2 answers:

Novay_Z [31]4 years ago

7 0

Answer:

The answer is:

$(4*4)+(2*5)$

Step-by-step explanation:

In order to determine the answer, we have to know about the rules of the basic math operations.

In math, we have the basic operations:

multiply
add
subtract
divide

If we have all these basic operations in a expression, the order to solve every one is:

multiply/divide
add/subtract

Also, we need to know that if there is a phrase that says "the product of something", we have to multiply two values, in this case, 4 and 4.

Regarding to the phrase "added something" it means we have to add two expression, in this case, the product "4 and 4" and the next value "double 5".

Finally, the expression is:

$(4*4)+(2*5)$

Alinara [238K]4 years ago

6 0

4•4+2•5

4(4)+2(5)

4x4+2x5

4²+2(5)

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Find the circumference of a circle whose area is 24

zalisa [80]

The answer is: " 17.35 " .

__________________________________

→ The circumference of the circle is: " 17.35 units " .

__________________________________

The area, "A", of a circle:

A = $\pi$ * r² ;

Note: $\pi = 3.14$ .

The area of the circumference, "C", of a circle:

C = 2 $\pi$ r .

__________________________________________

Given:

A = 24 ;

Use the formula for the area, "A" of a circle, to find the radius, "r" .

Then, plug the value obtained for "r" into the formula for the circumference, "C" , of a circle:

C = 2 $\pi$ r l

To solve for the circumference, "C", of the circle.

________________

A = $\pi * r^{2}$ ;

24 = 3.14 * r² ;

↔ 3.14 * r² = 24 ;

Divide each side of the equation by "(3.14)" ;

[3.14 * r²] / 3.14 = (24) / (3.14) ;

to get:

→ r² = 7.64331210191 ;

Take the positive square root of each side of the equation;

to isolate "r" on one side of the equation; & to solve for the radius, "r" ;

→ ⁺√(r²) = ⁺√(7.64331210191) ;

to get:

→ r = 2.76281034802 ;

____________________________

Now, plug this "obtained value" for the radius, "r" into the equation for the formula for the circumference, "C" of a circle:

→ C = 2 $\pi$ * r ;

to solve for the circumference, "C", of the circle:

→ C = 2 * (3.14) * (2.76281034802) ;

= (6.28) * (2.76281034802) ;

= 17.3504489856 ;

→ round to: " 17.35 units" .

__________________________________

The answer is: " 17.35 " .

__________________________________

→ The circumference of the circle is: " 17.35 units " .

__________________________________

6 0

4 years ago

Adam plans to choose a video game from a section of the store where everything is 75% off. He writes the expression −0.75 to fin

Salsk061 [2.6K]

Answer:

Step-by-step explanation:

Adam plans to choose a video game from a section of the store where everything is 75% off.

The expression written by him for this situation is d - 0.75d.

Here, the part d represents the sale price before discount and the part 0.75d is the discount amount.

The expression written by Rena is 0.25d.

Here, the part 0.25d is the price after discount. Since 75% is the discount, the rate after disount is 25% and 25% of d is 0.25d.

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3 years ago

The perimeter of a rectangular garden is $_64$_ centimeters. The length of the garden is three times the width. Find the length

CaHeK987 [17]

Answer:

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Step-by-step explanation:

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leonid [27]

Answer:

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