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3 years ago

Evaluate + , if x = 10, y = -5, and z = -2.

Mathematics

2 answers:

stepladder [879]3 years ago

5 0

Answer:

post the whole thing

Step-by-step explanation:

then ill do it

vladimir2022 [97]3 years ago

3 0

Answer:

x+y+z = 21

(x+y+z)/3 = 7

The answer is 7

Step-by-step explanation:

Hope this helps . ;)

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Please help no one is helping me :/

Ket [755]

Your answer would be D. or B. I think but i know it's not A.

6 0

4 years ago

Find the Gp of 30th of 3,9,

krek1111 [17]

Answer:

2.06×10^14

Step-by-step explanation:

nth term of G.p = ar^n-1

the first term, a = 3 common ratio, r = 2nd term/ 1st term, 3rd term/ 2nd term, etc.

r = 9/3 = 3

30th term = 3(3)^30-1 = 2.06×10^14

8 0

3 years ago

What's is the answer to the equation 4(x+7)=9(x-1)+22 ?

Aleks [24]

Hello, there!

What's the answer to the equation 4(x + 7) = 9(x - 1) + 22

Answer: x = 3
------------------------------------------------------------------------------------------------------

Explanation:

First, let's simplify this
4 * x = 4x

4 * 7 = 28

Now, we have 4x + 28 = 9(x - 1) + 22

Now, let's simplify the right side by using the distributive property as well.

9 * x = 9x

9 * -1 = -9

Now, we have 4x + 28 = 9x -9 + 22

Let's combine like terms on the right side

-9 + 22 = 13

Npw, we have 4x + 28 = 9x + 13

Let's isolate the x. To do this, we will first subtract 28 from each side.

4x + 28 = 9x + 13
-28 -28

4x = 9x - 15

Now, we will subtract 9x from each side.

4x = 9x - 15
-9x -9x

-5x = -15

Now, we will multiply each side by -1 to make x a positive number.

-5x = -15
*-1 *-1

5x = 15

Finally, we will simplify this completely. To do this, we will divide each side by 5.

5x = 15
--- ----
5 5

x = 3

Our final answer is x = 3

I hope I helped!

Let me know if you need anything else!

~ Zoe

7 0

4 years ago

Lily and Elsa are both college students.Before mom gave them this months allowance lily had $750 and Elsa had &215.After mom

Drupady [299]

After mom gave each girl an equal amount of money for this months allowance, lily had twice as much money as Elsa. Thus mom gave $ 320 to each girl

Solution:

Given that Lily and Elsa are both college students

Before mom gave them this months allowance lily had $750 and Elsa had &215

Amount (in dollars) with Lily and Elsa already is given as:

amount with Lily = $ 750

amount with Elsa = $ 215

After mom gave each girl an equal amount of money for this months allowance, lily had twice as much money as Elsa

Let "x" be the equal amount of money which mom gave to Lily and Elsa

Now amount with Lily and Elsa after mom gave equal amount is:

amount with Lily = amount with Lily already + x

amount with Lily = 750 + x

amount with Elsa = amount with Elsa already + x

amount with Elsa = 215 + x

Given that lily had twice as much money as Elsa

Amount with lily = 2(amount with elsa)

750 + x = 2(215 + x)

750 + x = 430 + 2ax

2x - x = 750 - 430

x = 320

Therefore mom gave $ 320 to each girl

6 0

4 years ago

Find angle ADB of the equation

Aloiza [94]

Answer:

$m\angle ADB = 59\°$ .

Step-by-step explanation:

Given:

$\angle BDC = 31\°$

We need to find $\angle ADB$ .

Solution:

Now we can see that given figure is a rectangle with diagonals drawn in it.

So by properties of rectangle which states that;

"All angles of a rectangle are 90°."

So we can say that;

$\angle A = \angle B = \angle C = \angle D = 90\°$

But

$\angle D = \angle BDC + \angle ADB$

Substituting the values we get;

$31\°+\angle ADB = 90\°$

Subtracting both side by by 31 we get;

$31\°+\angle ADB -31\°= 90\°-31\°\\\\m\angle ADB = 59\°$

Hence $m\angle ADB = 59\°$ .

8 0

4 years ago