what does the y equal in the system of equations y= 2x-7 and 5x+2=4

Answers

Answer 1

Answer:

y = -31/5

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtract Property of Equality

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Systems

y = 2x - 7

5x + 2 = 4

Step 2: Solve for x

Define equation:                     5x + 2 = 4Subtract 2 on both sides;       5x = 2Divide 5 on both sides:          x = 2/5

Step 3: Solve for y

Define equation:                     y = 2x - 7Substitute in x:                        y = 2(2/5) - 7Multiply:                                   y = 4/5 - 7Subtract:                                  y = -31/5

Related Questions

I need help in this question please help me!:)

Answers

Answer:

(0,4) is the y intercept for function A

(0,3) is the y intercept for function B

so function A has the greatest y intercept

Step-by-step explanation:

What that guy or girl said bc I got it right
Hope this helps!

This is due tomorrow! I need help!
1. 4 ÷ 1/2
2. 3 ÷ 1/8
3. 5 ÷ 1/3

Answers

Answer:

1.8

2.24

3.15

Step-by-step explanation:

2, 20, 36, 50 is a prefect square

Answers

Answer

36 is a perfect square

50 is not a perfect square

20 is not a perfect square

2 is not a perfect square

So, the answer is 36

Hope this helps! <3

36 is a perfect square

This circle has a radius of 5 cm. What is the area of the circle?

Use = 3.14.
A.
157 cm2
B.
31.4 cm2
C.
15.7 cm2
D.
78.5 cm2

Answers

Answer:

D

Step-by-step explanation:

Answer:

A=πr²

3.14×5²

3.14×25

=78.5cm²

List the number from least to greatest.

Answers

Answer:

1. $1430

2. $930

3. $1070

4. 105

   96

  -20

  -76

  -560

Is (87 – 12) equivalent to 2y – 12?

Answers

Answer:

no

Step-by-step explanation:

Bacteria culture A culture of the bacterium Rhodobacter sphaeroids initially had 30 bacteria and t hours later increases at a rate of 2e2t 1 bacteria per hour. Find the population size after four hours

Answers

Complete Question

Bacteria culture A culture of the bacterium Rhodobacter sphaeroids initially had 30 bacteria and t hours later increases at a rate of 2e^2t 1 bacteria per hour. Find the population size after four hours

Answer:

3010

Step-by-step explanation:

We were given the rate: 2e^2t

Step 1

We would integrate

P = Population

dP/dt = 2e^2t

dP =( 2e^2t) dt

∫dP = ∫ 2e^2t dt

P(t) = (2e^2t)/2 + C

P(t) = e^2t + C

Step 2

We solve for C

The culture initially has 30 bacteria

When t = 0

P(0) = 30

P(0) = e^2t + C

30 = e^2× 0 + C

30 = 1 + C

C = 30 - 1

C = 29

Step 3

Find the population size after four hours

t = 4, C = 29

P(t) = e^2t + C

P(4) = e^2 × 4 + 29

P(4) = e^8 + 29

P(4) = 3009.957987

Approximately = 3010 bacteria

Chloe was given a large box of 36 chocolates for her birthday. If she eats exactly 2 chocolates each day, how many chocolates would Chloe have remaining 8 days after her birthday?​

Answers

Answer:

on edge I got it right so yea

James earned 96$ by mowing his neighbor yard. He spent 50% of his money on a video game. He is going to save 75% of his remaining money. How much would he save

Answers

Answer:

36

Step-by-step explanation

Subtract 50% from $96.00

96.00 - 48.00 = 48.00

Find out what is 75% of 48

48.00 - 75% = 36

URGENT WILL GIVE BRAINLIEST

Answers

Answer:

ok

Step-by-step explanation:

What is the difference between an expression and an equation?
Group of answer choices

A. Expressions have an equal sign and equations do not.

B. Equations have an equal sign and expressions do not.

C. They are the same.

Answers

Answer:A

Step-by-step explanation:

one morning the outside temperature was 14 Fahrenheit fine on the outside temperature had risen 18 Fahrenheit Play Midnight. By temperature had dropped by 6 Fahrenheit what was the outside temperature at midnight in degrees Fahrenheit ​

Answers

Answer:

14x18;16123

Step-by-step explanation:

Extending Patterns

What is the value of y when x = 0?

When x = 0, y =
pls help me

Answers

Answer:I believe y would also be 0

Step-by-step explanation: so sorry if I’m wrong but good luck! :)

Answer:

the person above me is correct!

Step-by-step explanation:

0 2021 Edg

Solve for n in each of the following equations:
(a)
n^ Pbase2=110​

Answers

Answer:

[tex]n = 11[/tex]

Step-by-step explanation:

Given

[tex]^nP_2 = 110[/tex]

Required

Solve for n

[tex]^nP_2 = 110[/tex]

Start by applying permutation formula:

[tex]\frac{n!}{(n-2)!} = 110[/tex]

Expand the numerator

[tex]\frac{n*(n-1) * (n-2)!}{(n-2)!} = 110[/tex]

(n-2)! cancels out

[tex]n*(n-1) = 110[/tex]

Expand

[tex]n^2 - n = 110[/tex]

Subtract 110 from both sides

[tex]n^2 - n -110= 110-110[/tex]

[tex]n^2 - n -110= 0[/tex]

Expand:

[tex]n^2 - 11n +10n-110= 0[/tex]

Factorize:

[tex]n(n-11) +10(n-11)= 0[/tex]

[tex](n+10)(n-11) = 0[/tex]

This implies that:

[tex]n + 10 = 0\ or\ n - 11 = 0[/tex]

[tex]n = -10\ or\ n = 11[/tex]

But n can't be negative.

So:

[tex]n = 11[/tex]

find the value of p in parallelogram

Answers

Answer:

p = 11

Step-by-step explanation:

In a parallelogram BA and CD are parallel so you would set the problem up 7p = p +66

- p both sides

6p = 66

divide 6 both sides

p = 11

help please please pleaseee!!!
(check the picture)

Answers

Answer:

the answer is x < - 6

Step-by-step explanation:

see the pictures for the step by step explanation

i hope this helps

if you need more help understanding algebraic inequality's

if this helps please give brainliest

and 5 stars

Also share this answer so it can help others

thanks,

skymillie28

Expert

f(x)=1/(6x+8)

Only value of x not in the domain?

Answers

Answer:The domain of the expression is all real numbers except where the expression is undefined. In this case, there is no real number that makes the expression undefined.

Interval Notation:

(

,

)

Set-Builder Notation:

{

x

|

x

R

}

Step-by-step explanation:

Need help extra points and Mark brainlist

Answers

Answer:

i think the answer would be 8 2/5

Step-by-step explanation:

but i also need to know what the other uestions are saying

what is another way to solve 8 × 6.98​

Answers

Answer:

8 × 6.98

Step-by-step explanation:

..............

Suppose you want to investigate the proportion of women police officers. How large should a sample be if the margin of error is .05 for a 92% confidence interval

Answers

Answer:

A sample of 307 is needed.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of [tex]\pi[/tex], and a confidence level of [tex]1-\alpha[/tex], we have the following confidence interval of proportions.

[tex]\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In which

z is the zscore that has a pvalue of [tex]1 - \frac{\alpha}{2}[/tex].

The margin of error is of:

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

In this question, we have that:

We dont know the true proportion of women police officers, so we use [tex]\pi = 0.5[/tex], which is when the largest sample size would be needed.

92% confidence level

So [tex]\alpha = 0.08[/tex], z is the value of Z that has a pvalue of [tex]1 - \frac{0.08}{2} = 0.96[/tex], so [tex]Z = 1.75[/tex].

How large should a sample be if the margin of error is .05 for a 92% confidence interval

We need a sample of n, and n is found when [tex]M = 0.05[/tex]. So

[tex]M = z\sqrt{\frac{\pi(1-\pi)}{n}}[/tex]

[tex]0.05 = 1.75\sqrt{\frac{0.5*0.5}{n}}[/tex]

[tex]0.05\sqrt{n} = 1.75*0.5[/tex]

[tex]\sqrt{n} = 17.5[/tex]

[tex](\sqrt{n})^2 = (17.5)^2[/tex]

[tex]n = 306.25[/tex]

Rounding up

A sample of 307 is needed.

pretty pls help me :3

Answers

Answer:

You can do 60 ÷ 6 = 10 groups.

Step-by-step explanation:

There are many ways to answer this and it's very simple.

6 and 10 is just one of the many factors of 60.

you can also do 60 ÷ 2 = 30 groups

Solve the inequality
5x+2 < 32

Answers

Answer:

x=6

Take 2 to the other side, the sign becomes negative. You're then left with 5x is less than 30. After that just divide both sides with 5 so that you're left with x.

The value of  x is less than 6

What is inequality?

Inequality shows the relationship between two values in an algebraic equation that are not equal.

The given inequality is 5x + 2 < 32

Subtract -2 from both sides of the inequality then we get

5x < 30

Next, divide both sides by 5, then we get the range of x.

i.e x < 6

The solution to the given inequality  is x < 6 .

To learn more about inequality use the below link:

https://brainly.com/question/28823603

#SPJ5


CORRECT ANSWER GETS BRAINLIEST!

Answers

Answer: 3 different orderings :)

Step-by-step explanation:

Answer:

504

Step-by-step explanation:

9*8*7 = 504

40,-20,10,-5,__,__,__
What are the next three numbers.

Answers

Answer:

2.5, -1.25, 0.625

Step-by-step explanation:

The linear scale factor of two similar solids is given. Then the surface area and volume of the smaller figure are also given. Find the surface area and volume of the large figure.

Scale factor: 2:5

Surface area: 80

volume: 352

Surface area: ?

volume: ?

Answers

Answer:

Surface area: 500

Volume: 5500

Step-by-step explanation:

Scale factor: 2:5

This means that the dimensions of the larger figure are 5/2 of those in the smaller figure.

Surface area:

The surface area is found multiplying the square of the change(5/2) by the original surface area(80). So

[tex]S = (\frac{5}{2})^2 \times 80 = \frac{25}{4} \times 80 = 25 \times 20 = 500[/tex]

Volume:

The volume is found multiplying the cube of the change(5/2) by the original volume(352). So

[tex]S = (\frac{5}{2})^3 \times 352= \frac{125}{8} \times 352 = 125 \times 44 = 5500[/tex]

What does the inverse of a positive number mean?

Answers

Answer:

When it comes to positive and negative numbers, you can think of the inverse as being the "opposite." For example, for 5, the inverse is -5.

CAN ANYBODY HELP ME PLZ

Answers

Answer: isosceles scalene scalene and equalateral

Step-by-step explanation:

which one is correct????

Answers

Given:

[tex]m\angle ABC=46^\circ[/tex]

BD bisects angle ABC.

To find:

The [tex]m\angle ABD[/tex].

Solution:

It is given that, BD bisects angle ABC. It means, BD divides the angle ABC is two equal parts. So,

[tex]m\angle ABD=m\angle DBC=\dfrac{\angle ABC}{2}[/tex]

We need to find [tex]m\angle ABD[/tex], so

[tex]m\angle ABD=\dfrac{\angle ABC}{2}[/tex]

[tex]m\angle ABD=\dfrac{46^\circ}{2}[/tex]

[tex]m\angle ABD=23^\circ[/tex]

Therefore, the [tex]m\angle ABD[/tex] is 23°. Hence first option is correct.

Which letter has line symmetry?

Q
P
L
J
M?

Answers

Answer:

M

Step-by-step explanation:

because it is equal on either side if you cut a line down the middle of the letter

Daniel reads 30 pages of his books in 2 hours. Elizabeth reads 45 pages of her book in 3 hours. Do Daniel and Elizabeth read at the same rates, and why?

Answers

Answer:

C. Yes.  Daniel and Elizabeth each read 15 pages an hour

Step-by-step explanation:

30 + 45 = 75

3 + 2 = 5

75/5 = 15/h

Hope it helps, sorry if its wrong.

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