1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mandarinka [93]
3 years ago
15

Maria wants to solve the following system using the elimination method: 4x + 9y = 59 x + y = 17 What number should the equation

x + y = 17 be multiplied by to eliminate y? 4 −4 9 −9
Mathematics
2 answers:
Archy [21]3 years ago
7 0
\left\{\begin{array}{ccc}4x+9y=59\\x+y=17&|multiply\ both\ sides\ by\ (-9)\end{array}\right\\\\\underline{+\left\{\begin{array}{ccc}4x+9y=59\\-9x-9y=-153\end{array}\right}\\.\ \ \ -5x=-94
lesya [120]3 years ago
5 0

Answer:

we will multiply equation x+y=17 by (-9)

Step-by-step explanation:

Maria has two equations to solve by elimination method:

4x + 9y = 59 ---- (1)

x +y = 17 ----------(2)

To start with elimination method we will multiply equation (2) by (-9) first,

-9x - 9y = -153  -------(3)

Now we will add equation (1) to equation (3)

4x + 9y = 59

<u>-9x - 9y = -153</u>

-5x  = -94

5x = 94

x = 94/5

By putting x = 94/5 in equation (2)

\frac{94}{5}+ y = 17

y = 17 - \frac{94}{5} = \frac{85-94}{5}

= (\frac{-9}{5})

Answer :  we will multiply equation x+y=17 by (-9)

You might be interested in
Halim makes a profit of 120% on his cost price by selling a pair of shoes of $45. i) Find the cost pricer of the pair of shoes i
Rus_ich [418]

Answer:

a. $20.45

b. $24.55

c. $4.55

Step-by-step explanation:

In this question, we are asked to calculate the cost price and profit or loss selling a pair of shoes.

we proceed as follows

Firstly, we want to find the cost price given the selling price and the mark up percentage.

mathematically;

profit =( selling price - cost price)/cost price * 100%

here our profit is 120% with the cost price being $45. we plug these values

120 = 45-cp/cp * 100%

120cp = 100(45-cp)

120cp = 4500 -100cp

220cp = 4500

cp = 4500/220 = $20.45

His profit is selling price - cost price = 45 - 20.45 = $24.55

His profit selling same shoe for $25 is 25-20.45 = $4.55

4 0
3 years ago
Read 2 more answers
Niko uses 12 marshmallows and 8 graham crackers to make 4 s'mores.
Lerok [7]

Answer:

6 crackers, 9 marshmallows

Step-by-step explanation:

You have to divide to find how many graham crackers and marshmallows are needed to make 1 s'more:

8 / 4 = 2, so 2 crackers per s'more. Then,

12 / 4 = 3, so 3 marshmallows per s'more. Now that we know this, all we have to do is multiply each number by 3 to make 3 s'mores.

2 * 3 = 6, so 6 crackers, and

3 * 3 = 9, so 9 marshmallows.

:)

3 0
3 years ago
Read 2 more answers
The water level in a lake was monitored and was noted to have changed −1 1/5 inches in one year. The next year it was noted to h
pychu [463]

Answer:

the answer is 5 1/9 inches per month (answer)

Step-by-step explanation:

4 0
3 years ago
PLEASE ANYONE HELP I NEED IT DONE BY 11:59 this is the second part to the first part six question all together someone please he
Archy [21]
I believe question 4 is 40 but I’m not sure
6 0
3 years ago
I need help with this <br><br> 10 points <br><br> Pls pls pls someone come help me
Vikki [24]

Answer:

angle b is 62 degrees. This is because if we solve for x, by putting the 2 equations equal to each other(because they are vertical angles), than we figure out that x=6. Now plug that into angle b's equation, and you get 62 degrees.

Step-by-step explanation:

7 0
3 years ago
Other questions:
  • At a dog competition, a dog is awarded 10 points if it runs through 4 pipes, makes 10 jumps, and walks on 2 beams. If Roofy gets
    9·1 answer
  • What is the value of the 3 in 136,422
    9·1 answer
  • HELP ASAP WILL GIVE BRAINLIEST
    8·1 answer
  • Could I solve this inequality by completing the square? How would I do so?
    15·1 answer
  • <img src="https://tex.z-dn.net/?f=%24%5Coverline%7BBY%7D%24" id="TexFormula1" title="$\overline{BY}$" alt="$\overline{BY}$" alig
    15·1 answer
  • A popcorn cup is in the shape of a cone
    9·1 answer
  • A produce box can hold no more than 25 pounds of potatoes.
    15·1 answer
  • Can somebody pls help me!! :(( it’s due today
    10·1 answer
  • Can someone help plz need this to save my grade??
    12·1 answer
  • Brads class collected 95 used books for the book drive. They packed the books in boxes of 23 books each. How many boxes did they
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!