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4 years ago

Simplify: 5.4 x 7/4

2 answers:

7 0

The answer is 9.45, as 5.4 converted to a fraction would be 5 2/5, which equals 12/5, so 12/5 * 7/4 = 84/20, which equals 9.45(after doing the math.)

Hope this helps, and have a good day:)

Anon25 [30]4 years ago

4 0

The solution for this problem is 9.45

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Karen is making a frame for a square picture with an area of 169 square inches. How many inches of framing are needed?

Elanso [62]

Answer: 13

Step-by-step explanation:

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3 years ago

What two positive real numbers whose product is 21 have the smallest possible sum?

GalinKa [24]

Answer:

$x=\sqrt{21}$

$y=\sqrt{21}$

Step-by-step explanation:

Let x and y are the two positive real numbers

product of two numbers is 21

$x y=21$

$y=\frac{21}{x}$

The sum of the two numbers is f(x) =x+y

Replace y with 21/x

$f(x) =x+\frac{21}{x}$

we need to find smallest possible sum , so we take derivative using power rule

$f'(x)= 1-\frac{21}{x^2}$

when sum is minimum then the derivative is equal to 0

$0= 1-\frac{21}{x^2}$

$0=\frac{x^2-21}{x^2}$

multiply both sides by x^2

$x^2-21=0$

$x^2=21$

Take square root on both sides

$x=\sqrt{21}$

$y=\frac{21}{x}$

$y=\frac{21}{\sqrt{21}}$

$y=\sqrt{21}$

3 0

4 years ago

Write an expression to represent the area of a trapezoid which can be found my multiplying the height of the trapezoid by half o

erma4kov [3.2K]

2(a^2+b^2).

A^2 but b^2 = c^2 (area of triangle)

A trapezoid is two triangles put together i just say multiply those together

7 0

3 years ago

4cm 10cm Base= Height= Area=

Anton [14]

Answer:

Step-by-step explanation:

If you're talking about a square, then the area would be 40.

If you're talking about a triangle, then the area would be 20.

8 0

3 years ago

Find the area of a square with sides of length 3/4 inch.

Natali5045456 [20]

The area of the square is 9/16 sq.inches or 0.56 sq.inches

Step-by-step explanation:

The formula used to find area of the square is :

Area of the square = a².

where,

a is the length of the each side of the square.

It is given that, the length of the side of square is 3/4 inch.

Therefore, the value of a is 3/4.

Area of the square = a² = (3/4)²

⇒ (3/4) $\times$ (3/4)

⇒ 9/16 sq. inches

Area of the square = 9/16 (or) 0.56 sq. inches

4 0

3 years ago