Mathematics High School

Solve: 2x + 3y = 1
y = -23 +11

Answers

Answer 1

Answer:

x = 18.5

y = -12

Step-by-step explanation:

First, solve y:

y = -23 + 11

y = -12

Then, solve the main problem:

2x + 3y = 1

(Substitute y)

2x + -36 = 1

2x - 36 = 1

2x = 1 + 36 = 37

x = 37 / 2

x = 18.5

Related Questions

Which of the following equations is equivalent to 3 • 12 = 36?
36 + 3 = 12
36 ÷ 3 = 12
36 • 3 = 12
36 – 3 = 12

Answers

Answer:

B

Step-by-step explanation:

36 ÷ 3 = 12 is basically the division version of the original equation. None of the other equations equal the same answer so B is the correct option.

36 ÷ 3 = 12 is equivalent to 3 • 12 = 36

Joseph can spend at most $30 on new school supplies. If glue sticks cost $3 a piece, how many can he buy?

Answers

Answer:

30/3 = 10

he can 10 pieces

Step-by-step explanation:

Which vectors represent the reflection of the vector <3, -7> across the x-axis? A. [3/7} B. [-3/7] C. <-3, 7> D. <3, 7> E. [7/-3] F. <7, -3>

Answers

Answer:

D)    < 3, 7)>

Step-by-step explanation:

Explanation:-

Given that the vector < 3 , -7 >

Given the vector reflection across the x-axis

                   (x,y) → (x , -y)

The vector < 3,-7> →< 3, -(-7)>

                  < 3,-7> →< 3, 7)>

Kelly earned $20 for babysitting. She has also earned money by doing chores for 5 weeks. Altogether, she has earned $100. How much does she earn each week for doing chores?

a. $25
b. $20
c. $16
d. $10​

Answers

Answer:  16

Step-by-step explanation:

i did the math trust me

The answer is C, $16

im give 15 points if you know this phm

Answers

Answer:

The answer is option (D) 8.17 × 10^8...

Hope u like it

Answer:

d... 8.17 * 10^8

Step-by-step explanation:

（*゜ー゜*）do you know what it means?

Add the following complex numbers: (2 + 3i) + (3 - 2i)

Answers

Answer:

5 + i

Step-by-step explanation:

Combine real part ans combine imaginary parts

2 + 3i + 3 - 2i = 2 + 3 + 3i - 2i

                      = 5 + i

Answer:

5 and 1i

Step-by-step explanation:

So you’re adding the following complex numbers: (2 + 3i) + (3 - 2i)

normally if you see a (-) in front of a number, that means it’s negative so we’re gonna think about this as -2i and positive 3.

so you’re gonna want to take the 2 regular while numbers (without the variable) and then add those together. they’re like numbers so neither of them have a variable, which means they can easily be added, but you can’t add a number like 7 to a number like 9h because there’s a variable.

Now that you’ve added the 2 and 3, you get 5 right? so now you’re gonna take the 3i and -2i, and add those together. since the number 3i is bigger than -2i, the ending number after you add those is gonna be positive, and it’s gonna be 1i.

now i’m not sure if you’re supposed to make an equation out of this but you’re answer will be 5 and 1i or 5 + 1i

also if you don’t want to put 1i, 1i is the same as just “i”. so you can put 5 + i :)

hope this helped!!

Find the value of x and the measure of the angle labeled 3x°.
A. X= 14; angle measure is 30°.
B. X = 10; angle measure is 42°.
C. X= 14; angle measure is 42°.
D. x = 10; angle measure is 30°.​

Answers

Answer:

answer is B............

Step-by-step explanation:

72-42...30

angle is 3x so divide it by 3

30 divided by 3 gives you 10

Answer:

D. x = 10; angle measure is 30°.​

Step-by-step explanation:

I did this exact question on A P E X and it correct. I hope this helped. Have a good day!

Proof:

If James measures 5‘4“ tall how tall is James in inches

Answers

Answer:

64 inches

Step-by-step explanation:

5 * 12 = 60

60 + 4 = 64

Which expression is equivalent to 5(x + 7)??????

Answers

Answer:

5x+35

Step-by-step explanation:

the parentheses means that you can multiply the outer number (5) with the inner numbers/variables

5*x=5x

5*7=35

5x+35

expand the expression
​ 7(10s-10)

Answers

Answer:

70s-70

Step-by-step explanation:

A company rents out 14 food booths and 26 game booths at the county fair. The fee for a food booth is $175 plus $8 per day. The fee for a game booth is $65 plus $7 per day. The fair lasts for d days, and all the booths are rented for the entire time. Enter a simplified expression for the amount, in dollars, that the company is paid.

The expression is ________

Answers

Answer:

$4140 + $294d

Step-by-step explanation:

Hello,

Let's write down what we know first,

d days

14 food baths -- $175 and $8 per day

26 game booths -- $65 and $7 per day

What we want to find the amount of money paid for both food baths and game booths so after finding them individually, we need to add them up.

We already know the company rents out 14 fb and 26 gb and we know that each fb is 175 dollars and each gb is 65 dollars, so we should find out the cost of buying them. We can also write out the total cost of

14 * $175 = $2450

26 * $65 =  $1690

Now lets find the per day cost,

14 * $8 * d = $112d

26 * $7 * d = $182d

With both equations added together we get,

$2450 + $112d

$1690 + $182d

Add those together and we get:

$4140 + $294d

What is the ratio of the calories Robyn burned on Wednesday to the calories she burned on Monday?
Captionless Image
A 4:3
B 3:2
C 5:3
D 5:4

Answers

How much did he burn?

hi plsss help me
and also pls show work

Answers

1. -21
2. 14
3. -5
Those are the answers

Answer:

bro i've had someone delete my answers... LIKE OVER 80

Step-by-step explanation:

Select the correct answer

Answers

Answer:

1/25x

Step-by-step explanation:

What’s the answer?

x² =

12
16
48

Answers

I think 16 is the answer
I’m pretty sure it’s 16

i honestly do not know how to do this help

Answers

Answer:

4x+32

Step-by-step explanation:

Answer:

4x+32

Step-by-step explanation:

first you multiple by distributive properties

solve a variable source

x-7=15

Answers

Answer:

x = 22

Step-by-step explanation:

x = 7 + 15

x = 22

Answer:

x = 22

Step-by-step explanation:

1x - 7 = 15

1x = 15 + 7

1x = 22 (divide both sides by the first number/1 to get x)

1x/1 = 22/1

x = 22

Have a great day!!

2. When was the dollar worth more than it was today?

A. 1990

B. 1880

C.1960

D. 2016

Answers

Answer:

1960

Step-by-step explanation:

1880 unknown

1990 $1.23

2016 $1

1960 $8

I’m pretty sure it was
C.1960
But I’m not 100% positive

Please someone help me, I really need help with this.

Answers

Answer:

9

Step-by-step explanation:

its 9 because that's where 3 pens are plotted in the graph

One page of a petition can hold p signatures. You were able to get 4p+5 people to sign the petition. Your friend was able to get 2p−3 people to sign the petition. Write an expression in simplest form that represents the number of people that you and your friend got to sign the petition.

Answers

Answer:

6p - 2

Step-by-step explanation:

The expression that needs to be made in this question refers to the total number of people that signed the petition. To calculate this we need to add the total number of signatures that both you and your friend were able to acquire. Once we do this we simply combine like terms in order to simplify the expression as much as possible.

4p + 5 + 2p - 3

4p + 2p + 5 - 3

6p - 2

Therefore, the total and simplified expression for the total number of signatures would be 6p - 2

Plz help due tomorrow

Answers

Answer:

Step-by-step explanation:

8a + 16c

8(a + 2c)

answer is C

Part B

8(-5) + 16(-1)

-40 - 16 = -56

Answer:

PART A: 8(a + 2c)

PART B: -56

Step-by-step explanation:

PART A:

8a + 16c

8(a) + 8(2c)

8(a + 2c)

PART B:

8a + 16c

if a = -5, and c = -1,

8(-5) + 16(-1)

-40 + -16

= -56

Which ratio is not equivalent to 15 : 18?
A. 60 : 72
B. 35 : 42
C. 25 : 30
D. 90 : 105

Answers

the ratio 90: 105 is not equivalent to 15: 18

Ines has saved $5. She doubles the amount she saves each week. Does the function have a constant difference or a constant ratio? Does this represent an exponential function?

Answers

Answer:

The function have a constant ratio

No, it does not represent an exponential function.

Step-by-step explanation:

As given,

Ines has saved $5. She doubles the amount she saves each week.

⇒ In first week she saved = $5

   In second week she saved = 2×$5 = $10

   In third week she saved = 2×$10 = 20

  In fourth week she saved = 2×$20 = 40

and so on..

∴ we get the series

5, 10, 20, 40 ,.......

If the series is given as a, b, c, d, ..... , then

The common difference is defined as d = b-a = c-b

The common ration is defined as r = [tex]\frac{b}{a} = \frac{c}{b}[/tex]

Here, in the given question

The series is - 5, 10, 20, 40

This has no common difference , d =   10 - 5 (= 5 )≠ 20 - 10 (= 10)

As 5 ≠ 10

So the function does not define common difference .

Now,

This has common ratio , r =  [tex]\frac{10}{5} (=2) = \frac{20}{10}(=2)[/tex]

As 2 = 2

So, the function represent common ratio

Now,

The function does not represent an exponential function because it is increased by common ratio.

Find the amount of simple interest that $400 would earn at 8% per year by the end 3 1/2 years

Answers

9514 1404 393

Answer:

  $112

Step-by-step explanation:

The amount of interest is given by the formula ...

  I = Prt

where P is the principal earning interest at annual rate r for t years.

  I = $400 · 0.08 · 3.5

  I = $112

The amount would earn $112 in interest by the end of 3 1/2 years.

y^2 + 6y + 9 = 49 factor

Answers

(y+10)(y-4)

Explanation:
In order to solve you must set the equation to 0. Meaning you subtract 49 from 9 to get the original equation to now be y^2+6y-40.
You then set that equation (y^2+6y-40) to zero in order to factor it out.
To do this, you have to find two numbers that multiply to make -40 but add to make 6, which is where you get 10 and -4.
Hope this helped! :)

Answer:

(y+3)^2

Step-by-step explanation:

I hope i helped!

yooo help me with #6

Answers

Answer:

c

Step-by-step explanation:

It C bc i did it already

Determine the area of the coin to the nearest tenth.

Answers

Answer:

I THINK 20 mm

Step-by-step explanation:

Answer:

20mm

Step-by-step explanation:

Hope it helps you .....

I need help! ASAP! ITS DUE AT 11:59 PM
Estimate too

Estimate:
9 1\4 - 3 2\3. Word Form: Nine and one - fourth minus three and two - thirds

Estimate them too plss! Ill give brainliest!

Answers

Estimated answer: 13
Exact answer: 12 11/12

Answer:

5 7/12

Step-by-step explanation:

Convert 5.5833333333333

convert the following to inches

3' 8"
​

Answers

Answer: 44 inches

Step-by-step explanation:

believe me plz mark me brainliest plz

Answer:

44 inches

Step-by-step explanation:

I’m actually confused.

Answers

M^2 + n^2

Step 1:
Substitute in the numbers
-5^2 + 3^2

Step 2:
Square both numbers
25 + 9

Step 3:
Add them together

Answer is 34
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