Mathematics High School

2) y= 4x - 2
3х + 2y = 7
in subsitutuion

Answers

Answer 1

Answer:

x=1

Step-by-step explanation:

Substitute the y equation for the variable y in the second question

3x +2(4x-2)=7

3x+8x-4=7

11x-4=7

11x=11

x=1

Related Questions

A man has 33 coins in his pocket, all of which are dimes and quarters. If the total value of his change is 630 cents, how many dimes and how many quarters does he have?

Answers

Answer:

20 quarters and 13 dimes

Step-by-step explanation:

20 x 25 = 500

13 x 10 = 130

550 + 130 = 630

The function f(x) = 350 - 125x represents how
many miles f(x) the helicopter is from its destination
after x hours.
a. f(1) = 225, interpret this value in terms of context.

Answers

After one hour, the plane is 225 miles from its destination

Answer:

The helicopter is 225 miles from its destination and will reach the destination in 1 hr.

Step-by-step explanation:

mr rolando sold the house and that at 10, 500,000.00 if he will receive 4% commansion, how much his commansion? ​

Answers

Given:

Mr. Rolando sold the house and that at 10,500,000.00.

Commission percent = 4%

To find:

The amount of commission.

Solution:

We have,

Commission percent = 4%

Commission = 4% of selling price of the house.

                     = [tex]\dfrac{4}{100}\times 10,500,000[/tex]

                     = [tex]4\times 105,000[/tex]

                     = [tex]420,000[/tex]

Therefore, the amount of commission is 420,000.

I dentify the translation the orange triangle a is the pre-image the pre-image moved ___ until horizontally to form the purple triangle b the pre-image moved ___ until vertically units vertically to form the green triangle​

Answers

Answer:

The pre-image moved 5 units horizontally to form the purple triangle, B.

The pre-image moved 4 units vertically to form the green triangle, C.

Step-by-step explanation:

What is the yyy-intercept of y=5y=5y, equals, 5

Answers

Using the slope-intercept form, the y-intercept is 5 5 . b=5

Step-by-step explanation:

wikipedia

Answer:

0,5

Step-by-step explanation:

:) Hope you guys have a good day!

PLEASE HELP!! I’ve been stuck on this problem for a while!!!!!!!!!!

Answers

Answer:

What are the options?

Step-by-step explanation:

I'll do it once it the options

1. - 9 - 28 = -9+
Need answers

Answers

Answer:



-37=-9

hope this help

if it takes 7 hours to mow 4 lawns st the rate how many lawns could be mowed in 35 hours

Answers

You take 35 divided by 7 which is 5. 5 an hour and multiply it by 35
35
05
——

Answer:

Lets do 7 times 5. This is 35. That means we will be multiplying 5 by 4 to get 20, so 20 lawns in 35 hous\rrse

Step-by-step explanation:

(−3p2+5p−2)+(−p2−8p−15)=

Answers

Answer:

Step-by-step explanation:

When you distribute a positive sign to a parentheses, you essentially change nothing. So, you can drop all of the parentheses for this entire equation. Now combine like terms.

[tex]-4p^2-3p-17[/tex]

or

[tex]-1(4p^2+3p+17)[/tex]

Evaluate the following expression: 8x - 6 - 7y + 3 use x=3 and y=6

Answers

Answer:

-27

Step-by-step explanation:

8x - 6 - 7y + 3

X = 3 Y = 6

8(3) - 6 - 7(6) + 3

8 x 3 = 24

7 x 6 = 42

24 - 6 - (42 + 3)

(24 - 6) - 45

18 - 45 = -27

A suit is on sale for $336, which is 36% less than the regular price.
What is the regular price?

Answers

your regular price is about 456

Answer:

I think 456.96

Step-by-step explanation:

Luis and Arnold did their own car wash during the weekends this past Summer. They made a total of $1,200 together. They decided they were going to invest their money. So they invested in stocks for Tesla. The interest they are making is at 12%. How much money would they earn after 7 years?

Answers

Step-by-step explanation:

Amount they will earn=Principal+Interest

Interest=$1200×0.12×7=$1008

Amount=$(1200+1008)=$2208

write a story problem that can be represented with the following equation:
7.5x + 15 = 30

Answers

Answer:

I went to a concert with my friends and every ticket costs $7.50 and I also had to pay a fee of $15.

How is triangle ABC being translated to triangle A'B'C'

Answers

Answer:

Both vertically and horizontally

Step-by-step explanation:

It moved down and to the side.

It translated to A’B’C’

a line that includes the point (5, 1)and has a slope of 1

Answers

point slope form:
y-1 = 1(x-5)
y-1 = x-5

slope intercept form:
y = x-4

standard form:
-x + y = -4

Lily was out at a restaurant for dinner when the bill came. She wanted to leave a tip of 19%. What number should she multiply the cost of the meal by to find the total plus tip in one step

Answers

Answer: she should multiply 0.19 to the original price and then add that to the total cost before the tip and there is your answer.

Step-by-step explanation:

A cyclist rode 2.75 miles in 0.4 hours.How fast was she going in miles per hour.At this rate, how long will it take her to go 5.5 miles?​

Answers

Answer:

Its 12.5 miles per hour.

Step-by-step explanation:

Distance covered by cyclist=3.75 miles. Time =0.3 hours. Speed =3.75÷0.3=12.5

guys can u help me im cunfused

Answers

Answer:

2k

Step-by-step explanation:

-k + 3k = 2k

A roller coaster accelerated from rest to 55 m/s by the time it reached the first hill. The roller coaster took 15 seconds to climb to the top of the hill. What was the acceleration of the coaster?

Answers

Answer:

I believe the acceleration is 3.66666666667 m/s

Step-by-step explanation:

Acceleration formula: a = vf - vi / t

Initial velocity: 0 (I believe it was 0, as it wasn't moving in the beginning)

Final velocity: 55 m/s

Time: 15 s

Substituting values: 3.66666666667 = 55 - 0 / 15

Please help me with the question below.

Answers

Answer:

Alicia is correct

Step-by-step explanation:

The triangles are similar, then ratios of corresponding sides are equal, that is

left triangle to right triangle gives

[tex]\frac{r}{k}[/tex] = [tex]\frac{s}{m}[/tex]

Thus Alicia is correct. Jason has the incorrect sides on the second ratio

For the function f(x) = -3(x-1) find f(o).​

Answers

Answer:

f(0) = 3

Step-by-step explanation:

To evaluate f(0), substitute x = 0 into f(x) , that is

f(0) = - 3(0 - 1) = - 3 × - 1 = 3

3(5+4y)+8-2y how to do this plz

Answers

Answer:

[tex]3\left(5+4y\right)+8-2y=10y+23[/tex]

Step-by-step explanation:

Given

As the expression is given by

[tex]3(5+4y)+8-2y[/tex]

To determine

Simplify the expression

Let us simplify the expression

[tex]3(5+4y)+8-2y[/tex]

Expand 3(5 + 4y) = 15 + 12y

[tex]3\left(5+4y\right)+8-2y=15+12y+8-2y[/tex]

grouping like terms

                              [tex]=12y-2y+15+8[/tex]

                              [tex]=10y+23[/tex]

Therefore,

[tex]3\left(5+4y\right)+8-2y=10y+23[/tex]

SOMEONE PLEASE HELP ME WITH THIS ILL GIVE YOU BRAINLY IF U GET IT RIGHT !!!!

Answers

It will not be filled until 2 pm because the pool is filling up at a rate of 600gal every 15 min.
600x20=12,000 gal at 12 pm
600x28=16,800 gal at 2pm
How I got the time was there are 60 minutes in an hour divide that by 15 equals 4. And there is 5 hours between 8-12 so 5x4=20

Combine the radicals

Answers

The radicals never change in this situation. You just subtract 3 from 9 so you’ll get:
6(sqrt x)

Marsha swam 400 meters in 6
minutes and 12 seconds. Convert that time to minutes.

Answers

Answer:

6 minetes? how does this work?

Step-by-step explanation:

Find the value of x.
A
28
20
B
9x – 8
С

Answers

Answer:

The question is incorrect. please provide a diagram.

Solve the proportional equation below: m+9/4=m+6/5

Answers

Answer:

0=−21/20

0Step-by-step explanation:

PLEASE HELP ME GUYS ITS URGENT!!!!

Answers

Answer: c

Step-by-step explanation:

The answer is c because it is equal to 1024

Answer:

C. [tex]4^{5}[/tex]

Step-by-step explanation:

Matthew has already baked 7 cakes, and he can bake 1 cake with each additional stick of
butter he buys. How many additional sticks of butter does Matthew need in order to bake a
total of 31 cakes?

Answers

Answer:

24

Step-by-step explanation:

A line with a slope of
17
19
passes through the point (0, 18). What is its equation in
slope-intercept form?
Write your answer using integers, proper fractions, and improper fractions in simplest form.

Answers

Just trying to get points hope you find the answer
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