Solve the system by substitution.
5x + 9y = 21
-6y = x

Answers

Answer 1
5(-6y) + 9y = 21
-30y + 9y = 21
-21y = 21
divide both sides by -21.
y = -1

Answer : y = -1

Related Questions

slope is so hard i dont know how to do it pls help

Answers

Answer:

a 2/5

Step-by-step explanation:

have a good day /night may i please have a branlliest

Answer:

2/5

Step-by-step explanation:

-5y = -2z +9

5y = 2z -9

y = 2/5z -9/5

Giving brainlist to whoever answers

Answers

15,6 CM3. It's just A*B*C

Answer:

15.6 cm3 is the answer for the question

11. Determine the missing angle
measures.
M<1=
M<3=

Answers

Answer:

m3=56 and m1=75

Step-by-step explanation:

Awad claims that when m is a negative integer and n is a positive integer, n - m is always negative. Is Awad’s claim true or false? Explain your reasoning. If it is true, give an example to support his claim. If it is false, give a counterexample. Explain your reasoning..

Answers

Answer:

False

Step-by-step explanation:

False, because whenever you subtract a negative number, you always end up adding because two negatives make a positive. Lets say n is 4 and m is -3, 4-(-3) is going to turn into 4+3=7.

The Awad'claims that "when m is a negative integer and n is a positive integer, n - m is always negative". which is false.

What is the number system?

A number system is defined as a way to represent numbers on the number line using a set of symbols and approaches. These symbols, which are known as digits, are numbered 0 through 9. Based on the basic value of its digits, different types of number systems exist.

Awad claims that when m is a negative integer and n is a positive integer, n - m is always negative.

The above claim is false because subtracting a negative integer always results in an addition because two negatives equal a positive.

For example, n is 6 and m is -2; 6 -(-2) will equal 6 + 2 = 8.

Hence, the Awad'claims that "when m is a negative integer and n is a positive integer, n - m is always negative". which is false.

Learn more about the number system here:

https://brainly.com/question/21751836

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PLEASE HELP!!!!
Give the most precise classification for this figure, do not go off of what you see. it looks like a rectangle but we don't have the info to prove that. ​

Answers

Answer:

parallelogram

Step-by-step explanation:

Looks like a rectangle, but then angles should be marked =90

But two sides are marked equal that makes it a parallelogram.

(a parallelogram is 4 sided figure where 2 opposite sides are =

Easy please help asap!!

Answers

The ratio is 2:1 and the same for area

if you subtract 12 from my number and multiply the difference by -6 the result is -90 what is my number

Answers

Answer:

n must be 27

Step-by-step explanation:

Let this number be x.  Then -6(n - 12) = -90.

Dividing both sides by -6 yields n - 12 = 15.

Add 12 to both sides.

Then n must be 27.

Check:  subtract 12 from 27; this yields 15.  Now multiply this result by -6.  The result is -90, which was expected.

Work out the area of a rectangle with base,
b
= 26mm and perimeter,
P
= 70mm

Answers

Step-by-step explanation:
perimeter =2(l+b)
70=2(l+26)
70=2l+52
70-52=2l
18=2l
l=9
length =9
length *breadth =9*26
= 234
area = 234

Courtney save $6.18 each week. How much
will Courtney have saved after 14 weeks?

Answers

$86.52

6.18•14=86.52

I hope this helps and have a great day (Also brainliest would be appreciated but you don’t have to) :)

)) Layla buys a cookie sheet costing $3.22. She gives the cashier $5.00. The cashier gives
her her change using the least number of coins and bills possible. How many of each coin or
bill does she receive?
))
one-dollar bills
quarters
dimes
nickels
pennies
Submit

Answers

Answer:

1 one-dollar bill

3 quarters

3 pennies

Step-by-step explanation:

5.00 - 3.22 = 1.78

1 one-dollar bill

3 quarters (25 x 3 = 75 cents)

3 pennies (3 x 1 = 3 cents)

NO LINKS PLEASE. NEED REAL ANSWER AND EXPLANATION. THANKS!

Answers

Uhhh ur screen is blurry..post it again and I’ll answer it

You want to install a 1 yd wide walk around a circular swimming pool. The diameter of the pool is 23 yd. What is the area of the​ walk? Use 3.14 for π.

Answers

Answer:

415.48

Step-by-step explanation:

is the area

3^4/3^2
8 grade mathematics edulastic

Answers

Answer:

9 or 81/9

Step-by-step explanation:

Answer:

9

Step-by-step explanation:

1. Simplify the exponents

3^4 = 3*3*3*3 = 9*9 = 81

3^2 = 3*3 = 9

81/9 = 9

Find the volume of a baseball if the diameter is 2.86 inches

Answers

Answer:

8.1796

Step-by-step explanation:

2.86 x 2.86 = 8.1796

The side of polygone have length 5,7,8,11&9, the perimeter of similar polygone is 75cm ,finde the length of the side of large polygon?

Answers

Answer:

The side lengths of the larger polygon are;

15 cm

20.625 cm

16.875 cm

9.375 cm

13.125 cm

Step-by-step explanation:

Firstly, we need to calculate the perimeter of the first polygon

Mathematically, we can get this by adding the side lengths together

We have this as;

5 + 7 + 8 + 11 + 9

= 40 cm

so we have the ratio of the lengths of both as;

75 cm/40 cm = 1.875

Now, we simply will multiply the lengths of the smaller polygon by 1.875

So we have the side lengths of the bigger polygon as;

1.875 * 5 = 9.375 cm

1.875 * 7 = 13.125 cm

1.875 * 8 = 15 cm

1.875 * 9 = 16.875 cm

1.875 * 11 = 20.625 cm


What does it mean to isolate the variable?
А: Evaluate the coefficient.

B: Reverse the inequality sign.

С: Get zero by itself on one side of the inequality sign.

D: Get the variable by itself on one side of the inequality sign.

Answers

Answer: D

Step-by-step explanation: get the variable by itself on one side of the inequality sign.

Get the variable by itself on one side of the inequality sign. Option D

How to determine the meaning

Isolating a variable in an equation or inequality refers to changing it so that it is on its own on one side of the equation or inequality sign.

In order to remove any additional terms or factors that are affecting the variable, this entails applying different operations to both sides of the equation or inequality, such as addition, subtraction, multiplication, or division.

The objective is to make the inequality or equation simpler so that the variable can be solved more easily.

Learn more about variables at: https://brainly.com/question/28248724

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The complete question:

What does it mean to isolate the variable?

А: Evaluate the coefficient.

B: Reverse the inequality sign.

С: Get zero by itself on one side of the inequality sign.

D: Get the variable by itself on one side of the inequality sign.

helppppppppppppppppppppppppppppppp

Answers

Answer:

that link is a scam do not click on it

Step-by-step explanation:

there are people going around typing this link it guves your phone a virus

The dot plot shows the number of pencils each boy has at his desk in class.
:
++
1 2 3 4 5 6
Number of Pencils at Desk
Find the median for the number of pencils.

Answers

Answer:

The median is 2

Step-by-step explanation:

Here, we want to get the median for the number of pencils

Firstly, we have to write out the numbers that form the box plot ; we have this as;

1,1,1,2,2,2,2,3,3,5

the median is sum of the 5th and 6th term divided by 2

The 5th term is 2

The 6th term is 2

So the median is;

(2 + 2)/2

= 4/2 = 2

what is the radius of 28mm

Answers

Answer:

14mm

Step-by-step explanation:

Answer:

17

Step-by-step explanation:

they guy up there wrong ploto

h = -16++64t + 960
A ball is thrown into the air with an upward velocity of 64 ft/s. Its height, h, after t
seconds is given by the function above,
When did the ball hit the ground?

Answers

Two Answer: h=64t+944 and look at the picture for the other answer and can I have Brainliest please I really need it.

Step-by-step explanation: Hope this help :D

Use the Daily Compounding chart in your book to answer the following question. Alana Geltner deposited $2,250 in a savings account that pays 5.5 percent interest compounded daily. How much interest did she earn after 130 days?

Answers

Answer:

$2,369,136.10

Step-by-step explanation:

she earned $2,369,136.10 in interest after 130 days

What percent of 80 is 32? Enter your answer in the box.

Answers

Answer: 40

Step-by-step explanation:

80 = 100%

40 = 50%

8 = 5%

5% x 4 = 20

8 x 4 = 32

32 = 20%

Evaluate the expression below when x = 9 and y = 12.
4(x + 6) - 3(y + 4)

Answers

The answer would be 12


Multiply 6/5 by the reciprocal of (-3/8)

Answers

Answer:

-48/15, simplified to -16/5

Step-by-step explanation:

The reciprocal of -3/8 is -8/3. So the equation will be 6/5 x -8/3. Multiply numerators then multiply denominators to get -48/15. This can simplify to -16/5 by dividing both by 3.

Answer:

Step-by-step explanation:

hello :

6/5 by the reciprocal of (-3/8)  means : ( 6/5 )(-8/3) = - 48/15 = -16/5

In a geometric sequence, the first term, a1, is equal to 3, and the fourth term, a4, is equal to 192. Which number represents the common ratio of the geometric sequence?

A. R=4
B. R=6
C. R=5
D. R=7

Plz help me! Before in 7mins.

Answers

9514 1404 393

Answer:

  A.  r = 4

Step-by-step explanation:

For common ratio r, the second term is ...

  a2 = 3r

The next terms are ...

  a3 = (a2)r = (3r)r = 3r²

  a4 = (a3)r = (3r²)r = 3r³ = 192

Then the value of r is ...

  r³ = 192/3 = 64

  r = ∛64 = 4

The common ratio is r = 4.

Venus and Arian went berry picking. Venus picked 3 1/3 buckets of berries and Arian picked up 5 4/5 buckets. How many buckets of berries do they have altogether? If they need 11 full buckets, how many more buckets of berries do they need?

Answers

Answer: 9.13333333333

3 1/3+ 5 4/5=

Answer#2  1.86666666667

If 9/10 is multiplied by 8/9 , will the product be greater than either of the two factors?

Answers

Answer:

No, both of the numbers are less than one whole and when you multiply them (I got 4/5) 4/5 is less than both of the factors.

Answer:

No

Step-by-step explanation:

It will not be because when a number is numtiplied by one, it stays the same. However, both of these are numbers less than 1, so the product will be smaller

What is the area of the shaded portion of the trapezoid in the figure, in terms of? The figure is not drawn to scale. All of the given measurements are in feet.

Answers

Answer:

(150-36π) ft^2

Step-by-step explanation:

we need to subtract the area of the circle from the area of the trapezoid to find the area of the shaded region.

area of circle=πr^2=π6^2=36π ft^2

area of trapezoid=(1/2)(a+b)h=(1/2)(12+13)12=150 ft^2

so, the area of trapezoid-area of circle=(150-36π) ft^2


[tex](5 \sqrt{3} ) {}^{2} + 5 { }^{2} = x {}^{2} [/tex]

Answers

x = 10 , -10

is that what you’re looking for ?

37 1/2 of what number is 60

Answers

Answer:

The number is 1.6 .

Step-by-step explanation:

37.5x = 60

x = 60/37.5

x = 1.6

1.6 beacuse i answered this and it came out right
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