I don't understand how to do this problem. Could someone help?

Answer:

(- 1, 5 )

Step-by-step explanation:

Given the 2 equations

x + 2y = 9 → (1)

5x - y = - 10 → (2)

Multiplying (2) by 2 and adding to (1) will eliminate the y- term

10x - 2y = - 20 → (3)

Add (1) and (3) term by term to eliminate y

11x + 0 = - 11

11x = - 11 ( divide both sides by 11 )

x = - 1

Substitute x = - 1 into either of the 2 equations and solve for y

Substituting into (1)

- 1 + 2y = 9 ( add 1 to both sides )

2y = 10 ( divide both sides by 2 )

y = 5

solution is (- 1, 5 )

x + 2y = 9 x + 2y = 9

=====》

5x - y = - 10 (×2) 10x - 2y = - 20

+____________

11x + 0 = - 11

11x = - 11

x = - 1

Thus :

- 1 + 2y = 9

Add both sides 1

2y - 1 + 1 = 9 + 1

2y = 10

Divide both sides by 2

2y ÷ 2 = 10 ÷ 2

y = 5

_____________________________

Answer:

p<-12/5

Step-by-step explanation:

Answer:

Multiply each term in [tex]-\frac{5}{6}p > 2[/tex] by [tex]-\frac{6}{5}[/tex] to eliminate the fractions.

Inequality form:

[tex]p < \frac{-12}{5}[/tex]

Interval Notation:

(-∞, [tex]-\frac{12}{5}[/tex] )

After talking with you here are two different options I think you are trying to ask:

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If you are talking about: [tex](\frac{-12}{3}) ^{3}[/tex]

Answer: -62

Explanation:

PEMDAS tells us we need to do the exponent first:

-12³ = (-12)³ = -1728

The parentheses are important so you cube the negative sign as well!

3³ = 27

-1728 / 27 = -62

                           [tex](\frac{-12}{3}) ^{3}[/tex] simplified is -62

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

If you are talking about (-1[tex]\frac{2}{3}[/tex])³

Answer: -[tex]\frac{125}{27}[/tex]

Explanation:

First, let us turn -1 and two thirds into a mixed number:

Ignoring the negative for now, we can 1 times 3 is 3. 3 plus 2 is 5. 5/3 is 5/3. Adding in the negative we get [tex]-\frac{5}{3}[/tex]

To cube it we must do:

([tex]-\frac{5}{3}[/tex])([tex]-\frac{5}{3}[/tex])([tex]-\frac{5}{3}[/tex])

3 times 3 (9) times 3 is 27

5 times 5 (25) times 5 is 125

So we have 125/27

For the negative, we have three - - -

Two cancel each other out, and we are left with one (-) so our answer is negative

                           (-1[tex]\frac{2}{3}[/tex])³ simplifed is -[tex]\frac{125}{27}[/tex]

Answer:

1. y = 90x

x: the amount of companies to start

y: The total amount it will cost.

2. y = 30x

y: the total income

x: the amount of sweaters being sold.

The answer to the last question(I think would be):

cost:  $30

income: $60

as:

equation to find cost = y = -15x

equation to find income = y = 30x

Answer:

https://learning-ph.com/math/question7489744

pls check this site

Step-by-step explanation:

Answer:

104 m²

Step-by-step explanation:

There is a 1 m sidewalk around the garden

Then length = 30 + 1 + 1 = 32 m

and width = 20 + 1 + 1 = 22 m

Area = 32 × 22 = 704 m²

Area of garden = 30 × 20 = 600 m²

Area of sidewalk = 704 - 600 = 104 m²

Answer:

30%

Step-by-step explanation:

Answer:

b and c

Step-by-step explanation:

B AND C

[tex] \frac{9}{11} \div \frac{3}{2} [/tex]

[tex]= \frac{9}{11} \times \frac{2}{3} \: \: \: \: \: \: \fbox{ gets \: reciprocal} \\ \\ = \frac{ \cancel9}{11} \times \frac{2}{ \cancel3} \\ \\ = \frac{3}{11} \times \frac{2}{1} \\ \\ = \frac{6}{11} [/tex]

[tex] \fbox \red{Hope This Helps}[/tex]

Measurement of angle 4 is 40°

Answer:

You have 2 points where the graph intersects with the x-axis, x=-1 or x=5.

The graph intersect with the y-axis at y=-2

1. 60*

2. 30*

i not sure that this is right

Answer:

$382.5

Step-by-step explanation:

Answer:

64 can go into 28 0.4375 times. (less than 1 in a nutshell)

Step-by-step explanation:

Answer:

0.17

Step-by-step explanation:

1) Simplify 54/50 to 27/25

-27/25-40/100+1.65

2) Simplify 40/100 to 2/5

-27/25-2.5+1.65

3) Simplify

4.25/25

4) Simplify

0.17

Answer:  It depends on the weight of an apple.  If 1 apple = 0.50 lb, then 1 apple costs $0.25

Step-by-step explanation:

We need to know the weight of one apple.  If one apple weighed 0.5 lb, on the average, then:

($0.50/lb)*(0.5 lb/apple) = $0.25/apple

Answer: (x+8)(x-8)

Step-by-step explanation:

i am going to assume that the 2 in your question is raised so that it reads x to the second power minus 64

(x+8)(x-8)

to check this, using foil it would be x^2 - 8x + 8x -64

Answer:

Either d or b

Step-by-step explanation:

pls give brainliest

Answer:

58

Step-by-step explanation:

180-122=58

Answer:

X=- 1

y=- 5

Step-by-step explanation:

X=- 1

y=- 5

Answer:

fishy uhhh

Step-by-step explanation:

This answer should help.

9514 1404 393

Answer:

     log(128) = t·log(2)

Step-by-step explanation:

You can take logarithms the way the formula is, or you can simplify it first.

As is

  log(10000) = log(625) -log(8) +t·log(2)

__

Simplified

  8·10000/625 = 2^t . . . . . multiply by 8/625

  128 = 2^t

  log(128) = t·log(2)

_____

Solution:

  t = log(128)/log(2) = 7

Answer:

Vertical line that passes over 1 the x axis. (No y-intercept)

Step-by-step explanation:

Answer: Heyy BFF The Answer is x= -8 or x=10

Step-by-step explanation: Stay Sliving ❤️

Answer:

2+4f

Step-by-step explanation:

Distribute:

2(1+2f)= 2+4f

Hope this helps! :)

Answer:

7x+5y=-3

Step-by-step explanation: