Mathematics High School

solve this system of equations.

3x+4y=4
-x-3y=7

Answers

Answer 1

Answer:

x = 8, y = -5

Step-by-step explanation:

Multiplying the 2nd equation by 3, we get -3x-9y = 21. Then eliminating with the first equation we get -5y = 25. y = -5. Substituting this into the original equation, we get x = 8.

Answer 2

Answer:

x=8  y=-5

Step-by-step explanation:

3x+4y=4                   3x+4y=4

3(-x-3y=7)=              -3x-9y=21

-3x-9y=21                      -5y=25

                                       y=-5

3x+4(-5)=4

3x-20=4

3x=24

x=8

Related Questions

Select ALL the true statements:
(See the screenshot please :) )

Answers

Answer:

B. Dilations of an angle are congruent to the original angle.

E. Dilations of a triangle can be similare to the original triangle.

Step-by-step explanation:

These both look like the only correct ones.

Hope it helps!

A circle with radius of 2 cm sits inside a circle with radius of 4 cm.
What is the area of the shaded region?
Round your final answer to the nearest hundredth.
2 cm
4 cm

Answers

I just multiplied the both radius by each other. And that's 2cm × 4cm= 8cm

Which transformations were used to create triangle J'K'L'?
Y 4
10-
dilation by a scale factor of and a reflection
across the y-axis
8
6
4
dilation by a scale factor of 2 and a rotation
of 90° clockwise about the origin
2
2
2
-6
10-8
g
10
-4 1-2 ol
-2
dilation by a scale factor of and a reflection
K.4
across the x-axis
-6
-8-
dilation by a scale factor of 2 and a rotation
of 90° counter-clockwise about the origin
-10-

Answers

Answer:

C

Step-by-step explanation:

Answer: C

Step-by-step explanation:

Two students are reading a novel. Ashley reads 10 pages per day. Carly reads 8 pages per day, but she starts early and is already on page 40.

Answers

Answer:

im not sure what the question is but.....

Step-by-step explanation:

It would take Ashley 4 days to reach page 40, while it would take Carly 5 days to reach page 40.

Please follow me!!! i would really appreciate it. :) Have a great day!!! Hope this helps you!!! :)

1. Find x in the right triangle shown. Round your answer to the nearest tenth.
7
9
2.0
5.7
11.4
16.0

Answers

Answer:

well ya see ifjfbfhhdnsjdudhsbsjsjsnehdhsiwnshdjsjsh

I think the answer is 9

Find the product.

(-2x 2)3 ·3x

Answers

Answer:

-15x

hope it's helpful ❤❤❤❤❤❤

THANK YOU.

f(x) = -x^2 + 8x
find f(-7)

Answers

Answer:

105

Step-by-step explanation:

Missing measurements in each triangle

Answers

Answer:

50

Step-by-step explanation:

107+23= 130

180-130= 50

You're welcome :P

50 because 107+23=130
180-130=50

Jon swam 50 meters freestyle in a competition. How many kilometers did Jon swim?

Answers

Answer:

.05 kilometers

Step-by-step explanation:

One kilometer is 1000x more than a single meter. And [tex]50 \div 1000 = .05[/tex].

Find the missing number so that the equation has infinitely many solutions.
3x + 9 =
x + 9 + x
What’s the answer?

Answers

3x + 9= 3 (x + 3)
x + 9 + x= 2x + 9

Answer:

x= 0 is correct.

The map shows Greece during the Peloponnesian War.How did Sparta benefit from its location during the Peloponnesian War?

Sparta had ample coastline for its substantial navy.
Sparta was located inland, protecting it from the Athenian navy.
Sparta was on the Aegean coast, protecting it from a land invasion.
Sparta was located on its own island far away from the members of the Delian League.

Answers

Answer:

The answer is b

Step-by-step explanation:

Hope i helped ^^

pls help i only need the answers

Answers

may i ask what the multiple questions say in the boxes?

- muffin

For 100 points.


The multiplicative inverse of 5 and (10x + 15)

Answers

Answer:

Download Math-way

Step-by-step explanation:

type in the problem and it answers

A line passes through (0,1) and (-6,4) what is the slope of the line?

Answers

Answer:-5/6x

Step-by-step explanation:

Determine whether quadrilateral ABCD with vertices A(–4, –5), B(–3, 0), C(0, 2), and D(5, 1) is a trapezoid.

Step 1: Find the slope of AB. The slope of AB is
.
Step 2: Find the slope of DC. The slope of DC is
.
Step 3: Find the slope of BC. The slope of BC is
.
Step 4: Find the slope of AD. The slope AD is
.
The quadrilateral is a trapezoid because
.

Answers

Answer:

5-1/52/32/3Only one pair of opposite sides are parallel

Quick I need help: Sunny earns $18 per hour delivering cakes.She worked for x hours this week.Unfortunatly,she was charged $10 for a late delivery on Tuesday.How much money did sunny earn this week ?wriite your answer as an expression

Answers

18x - 10
There is no way to find out how many hours she worked so the answer is an expression. An expression has no equal sign.

For each ordered pair , determine wether it is a solution to y=6x+5

Answers

Answer:

1. no

2. no

3. no

4. yes

Step-by-step explanation:

The price of a loaf of a particular type of bread increased from $3.69 to $5.49 from 2009 to 2019. What was the percent increase in the price of the loaf of bread over those years? Round your answer to the nearest tenth of a percent.

Answers

Answers:

A) 51.3%

B) 55.9%

C) 32.8%

D) 48.8%

Step-by-step explanation:

Answer:

48.8%

Step-by-step explanation:

which number is rational

Answers

0.7 is the rational number

Answer:

The answer is D 0.7

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0
bigideasmath.com
C
U +
C Clever I Portal
Dashboard
Big Ideas Math
pe
::: CALCULATORS
Classify each polynomial according to its degree and type.
Monomial
Binomial
Trinomial
Degree 1
Degree 2
Degree 3
:: 9x
:: 5 - 2x3
:: - 4x2
:: x + 6
:: 3x² + 3x3 - 10
:: 4x2 - x
:: x - 3x² + 1

Answers

Answer:

Trinomial

Binomial

and monomial

Step-by-step explanation:

cual es la simplificacion de 72/48​

Answers

Answer:

3/2 Alli esta ojala que ayude

Answer:

1 1/2

~

Para encontrar la respuesta, reduzca la expresión, si es posible, cancelando los factores comunes, para obtener la respuesta:

1 1/2 or  [tex]1\frac{1}{2}[/tex]

~

To find the answer, reduce the expression, if possible, by canceling the common factors, to get the answer:

1 1/2  or [tex]1\frac{1}{2}[/tex]

would you use SSS or SAS to prove triangles congruent? PLEASE help

Answers

you would use SAS to prove it

Somebody who know they math,help me!!!!!

Answers

Answer:-5 to -10 to 10 to 1

Step-by-step explanation:

Answer:

C

Step-by-step explanation:

Evaluate the following equation for p:
-3p + 6 + 7p = 22

Answers

Answer:

4

Step-by-step explanation:

-3p+6+7p=22

-3p+7p=16

4p=16

p=4

Answer:

p = 4

Step-by-step explanation:

-3p+6+7p = 22

     -6         -6

----------------------

-3p+7p = 16

4p = 16

---     ---

4       4

------------

p = 4

Which phrase describes the time shown on the clock?
12
PS
11
10
E9
8
7
5
6
15 minutes after 3:00
20 minutes after 4:00
20 minutes after 3:00
16 minutes after 4:00

Answers

20 minutes after 3:00

Answer:

The answer is 15 minutes after 3:00

Susanne has no money. In order to buy her sister a gift, she borrowed $15 from her mom. When her birthday came, she received $45 dollars. If she repays her mom, how much money will she have?

Answers

Answer:

$30

Step-by-step explanation:

Given data

She borrowed $15 from her mom

Hence she is on -$15

She received $45 dollars

so when she repay $15 her balance will be

= 45-15

=$30

Hence she will save $30

2b-(3-b) + 4 = 11
I need to know how to show the work to get this answer

Answers

Answer:

10/3

Step-by-step explanation:

Simplifying 2b - (3-b) gives us:

2b - (3 - b) =

2b - 3 + b =

3b - 3

This makes our new equation:

3b - 3 + 4 = 11

Combine like terms

3b + 1 = 11

Subtract 1 from both sides

3b = 10

Divide both sides by 3

b = 10/3

cylinder has r = h and the radius is 4 cm. What is the volume?

Answers

Answer:

201.06 cm

Step-by-step explanation:

so if the radius and height is the same, height would be 4 cm.

volume formula for a cylinder: V=πr2h

answer: 201.06

Can anybody help me with this ?

Answers

Answer:

1st scenario: 163.3°

2nd scenario: 125.2°

3rd scenario: 142.3°

Step-by-step explanation:

1st scenario: angles 1 and 2 form a linear pair and add up to 180

2nd scenario: angles 1 and 4 are same-side interior and add up to 180

3rd scenario: angles 1 and 8 are corresponding and equal; if angle 7 is 37.7 then angle 8 is 142.3 (they form a linear pair). Since angles 1 and 8 are equal then angle 1 is also 142.3

Pls I need help this assignment is done before 11:59pm.

Solving systems of equations using substitution.

Can you also explain cause I didn’t understood that much.

Thanks.

Answers

Answers:

Blank 1 = 3Blank 2 = 3

In other words, x = 3  and y = 3

===========================================================

Explanation:

Let's solve the first equation for x. I'm picking on this equation variable because the coefficient is 1.

Solving for x leads to

x-2y = -3

x = -3+2y

I added 2y to both sides

Now we'll plug this into the other equation. This means we replace every copy of x with -3+2y since they are the same thing.

3x + 5y = 24

3( x ) + 5y = 24

3( -3+2y ) + 5y = 24 .... replace x with -3+2y

3(-3) + 3(2y) + 5y = 24 .... distribute

-9 + 6y + 5y = 24

11y-9 = 24

11y-9+9 = 24+9 ...... adding 9 to both sides

11y = 33

11y/11 = 33/11 .... dividing both sides by 11

y = 3

We'll use this y value to find x. We can pick on any equation with x & y in it, but I find it's easiest to use the equation where x is isolated

x = -3+2y

x = -3+2(3) .... replace y with 3

x = -3+6

x = 3

So both x and y are equal to 3

-------------------------------

Let's check the answer

Plug (x,y) = (3,3) into the first equation. We should get the same number on both sides after simplifying fully

x-2y = -3

3 - 2(3) = -3

3 - 6 = -3

-3 = -3

So far, so good. Let's try the other equation

3x + 5y = 24

3(3) + 5(3) = 24

9 + 15 = 24

24 = 24

The other equation is true as well. This fully confirms that (x,y) = (3,3) is the solution to this system of equations. If you graphed each original equation, you should find they cross at the location (3,3).

Side note: it won't always be the case that x and y are the same value.

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