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2 years ago

What is the value of the rational expression below when is equal to 5?

Mathematics

1 answer:

yaroslaw [1]2 years ago

7 0

Answer:

$\boxed {C. -2}$

Step-by-step explanation:

$\textsf {Substitute x = 5 in the expression :}$

$\longrightarrow \mathsf{\frac{15 - x}{x - 10}}$

$\longrightarrow \mathsf{\frac{15 - 5}{5 - 10}}$

$\longrightarrow \mathsf{\frac{10}{-5}}$

$\longrightarrow \mathsf{-2}$

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The blueprint for the Moreno Moreno's living room has a scale of 2 inches equals 7 feet 2 inches=7 feet. The family waThe bluep

lubasha [3.4K]

Corrected Question

The blueprint for the Moreno Moreno's living room has a scale of 2 inches equals 7 feet.The family wants to use a scale of 1 inch equals = 6 feet. What is the width of the living room on the new blueprint? A rectangle is labeled width = 12 inches.

Answer:

7 Inch

Step-by-step explanation:

The width of the room on the old blueprint = 12 Inches

Scale on the old blueprint:

2 inches = 7 feet.

Therefore: 1 Inch =7/2 feet

12 Inches =12 X 7/2 feet =42 feet

The actual width of the room is 42 feet.

Scale on the new blueprint

1 inch equals = 6 feet; which we can reorder as:

6 feet=1 inch

1 feet =1/6 Inch

Therefore:

42 feet = 42 x 1/6 Inch =7 Inch

Thus, the width of the living room on the new blueprint is 7 Inch.

7 0

3 years ago

A 12-kg bag of mangoes costs $9.00

Nookie1986 [14]

Answer:

I think it would be around $1.33 for each kg

Step-by-step explanation:

You would divide 12 by 9. Once you do that, you get 1.33

6 0

2 years ago

In the cookie jar there are 20 cookies. 1/4

stepan [7]

Answer:

15 chocolate chip

Step-by-step explanation:

1/4 of 20 is 5

this means there are 5 peanut butter cookies.

so 20-5= 15

this means there are 15 chocolate chip cookies

hope this helps!

4 0

3 years ago

The quotient rule for exponents states that bm bn=_______, b≠0 . When dividing exponential expressions with the same nonzero b

wariber [46]

Answer:

The quotient rule for exponents states that $b^{m}\div b^{n}=b^{m-n}$ .

When dividing exponential expressions with the same nonzero base, subtract the exponents.

Step-by-step explanation:

Some rules to solve exponents are:

$x^{0}=1$
$(x^{m})^{n}=x^{mn}$
$x^{-n}=\frac{1}{x^{n}}$
$x^{m}\cdot x^{n}=x^{m+n}$
$\frac{x^{m}}{x^{n}}=x^{m-n}$

The quotient rule for exponents states that:

$b^{m}\div b^{n}=b^{m-n}$ .

When dividing exponential expressions with the same nonzero base, subtract the exponents.

3 0

3 years ago

Sin^2x + sin^2x + cos²x

Nezavi [6.7K]

Answer:

Answer:

A. 2 sinx cosx - 1 + 2 sin^2 x.

Step-by-step explanation:

sin2x = 2 sinx cosx

cos2x = cos^2x - sin^2x

So sin2x - cos2x = 2 sinx cosx - ( cos^2x - sin^2x)

But cos^2 x = 1 - sin^2 x, so we have:

2 sinx cosx - (1 - sin^2 x - sin^2x)

= 2 sinx cosx - 1 + 2 sin^2 x.

7 0

3 years ago