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3 years ago

What is numerical coefficient of this term? -3z

Mathematics

1 answer:

zalisa [80]3 years ago

3 0

-3 because if you take apart your number then you get -3 and z.

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Can someone plz help me :(

Andrew [12]

Answer:

The last answer on your last image

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Find the product of all real values of r for which 1/2x=r-x/7

Dahasolnce [82]

Answer:

$r = \±\sqrt{14$

$Product = -14$

Step-by-step explanation:

Given

$\frac{1}{2x} = \frac{r - x}{7}$

Required

Find all product of real values that satisfy the equation

$\frac{1}{2x} = \frac{r - x}{7}$

Cross multiply:

$2x(r - x) = 7 * 1$

$2xr - 2x^2 = 7$

Subtract 7 from both sides

$2xr - 2x^2 -7= 7 -7$

$2xr - 2x^2 -7= 0$

Reorder

$- 2x^2+ 2xr -7= 0$

Multiply through by -1

$2x^2 - 2xr +7= 0$

The above represents a quadratic equation and as such could take either of the following conditions.

(1) No real roots:

This possibility does not apply in this case as such, would not be considered.

(2) One real root

This is true if

$b^2 - 4ac = 0$

For a quadratic equation

$ax^2 + bx + c = 0$

By comparison with $2x^2 - 2xr +7= 0$

$a = 2$

$b = -2r$

$c =7$

Substitute these values in $b^2 - 4ac = 0$

$(-2r)^2 - 4 * 2 * 7 = 0$

$4r^2 - 56 = 0$

Add 56 to both sides

$4r^2 - 56 + 56= 0 + 56$

$4r^2 = 56$

Divide through by 4

$r^2 = 14$

Take square roots

$\sqrt{r^2} = \±\sqrt{14$

$r = \±\sqrt{14$

Hence, the possible values of r are:

$\sqrt{14$ or $-\sqrt{14$

and the product is:

$Product = \sqrt{14} * -\sqrt{14}$

$Product = -14$

8 0

3 years ago

Solve for x. A. 37 B. 27 C. 30 D. 31

dexar [7]

Answer:

Step-by-step explanation:

The formula for finding the relationship between a secant and a tangent is

tangent length ^2 = external segment secant/full length of secant

In this case

60^2 = 48*(x + 48) Expand

3600 = 48*(x + 48) Remove the brackets/

3600 = 48x + 48^2 Expand

3600 = 48x + 2304 Subtract 2304 from both sides

3600 - 2304 = 48x

1296 = 48x Divide both sides by 48

1296 / 48 = x

x = 27

8 0

3 years ago

6 The area of a square is 32.5 square inches. Which best represents the length of one side of the square? F 32.5 -16 in. 16 . 5

laiz [17]

Answer:

The answer will be 5.701

Step-by-step explanation:

Find the square root of the area of the square

7 0

3 years ago

Chicos estoy en un aprieto ayudarme pls Sabiendo que una falda es 5 € más cara que una blusa y que si compro 6 faldas y 4 blusas

poizon [28]

Answer:

El precio de la falda es 50 €.

Step-by-step explanation:

Lo que sabemos:

$F = 5 + B$ (1)

En donde F es por falda y B por blusa.

Si compras 6 faldas y 4 blusas y pagas 480 €:

$6F + 4B = 480$ (2)

Entonces, al introducir la ecuación (1) en (2) podemos hallar el precio de cada falda.

$6F + 4B = 480$

$6(5 + B) + 4B = 480$

$10B = 480 - 30$

$B = \frac{450}{10} = 45$

Finalmente, el precio de la falda se puede encontar con la ecuación (1):

$F = 5 + 45 = 50$

Por lo tanto, el precio de la falda es 50 €.

Espero que te sea de utilidad!

7 0

3 years ago