Solve the system by substitution.
3x + y = 20
-7y=x

Please help

Answer:

c

Step-by-step explanation:

1 1/2 x1 1/2 x1 =2 and 1/4

2 and 1/4 x 8=18

Answer:

the answer is 1.88 using cosine =adj/hyp

Answer:

10-3y=12

or, -3y=12-10

or, -3y=2

or, y= 2/(-3)

or, y= -(2/3)

hope you got your answer! :)

Answer:

I meant an example for a problem like the one you posted.

Either way, I'll try to help.

in the example, you're finding out what percentage of 352 is 226.6.

So divide 226.6 (The number that you're using to find what percentage it is of 352) by 352( the number you're finding the percentage of.)

226.6/352= 0.64375, and multiply the quotient by 100 to get 64.375. You're rounding up by the nearest hundredth, so the 7 turns to 8. (5 or more means rounding up.)

your final answer for the example is 64.38%. So Try that with your next problem.

For the one you're working on, divide 110.9 by 100 and then multiply it by 419.

You'll get 464.671.

Step-by-step explanation:

distance must be given

average speed is distance and time

Answer:

0.0000000164

Step-by-step explanation:

x= 4y^-12

for,

y = 5

x = 4×5^-12

x = 4/5^12

x = 4/244,140,625

x = 0.0000000164

Answer:

y = 3 + 2x

Step-by-step explanation:

In this scenario, we are given two values which are the initial height of the plant and its growth height. Then we are given a variable which is the number of months (x) that are unknown for us. The growth height needs to be multiplied by the number of months to know how much it has grown in that time period. Then we add this value to the initial height of the plant to calculate the total height (y) of the plant after x number of months. We can apply this information to form the following equation in slope-intercept form.

y = 3 + 2x

[tex] \huge \purple{\tt{Answer:}} [/tex]

step 1 is wrong . The 1st step should be 15² - 9² = c² .

Answer: step A

Step-by-step explanation:

The Pythagorean theorem is a^2+b^2=c^2, where c is always the hypotenuse (the longest side of the triangle). Step A is written as 9^2(thats the a value squared)+15^2(which is the hypotenuse value squared)=c^2. It should be: 9^2+b^2=15^2

Answer: no

plz give brainleist

Step-by-step explanation:

let f be 2 10 x 2 - 10=10

2 x 8x2-5=22

Answer:

These two expressions are only equivalent when f=-5/6. If f=><-5/6, then the equations are not equivalent.

Step-by-step explanation:

Answer: 3, 37

Step-by-step explanation:

Divide by 3, divide by 3 again. 37 is a prime number, so it can't be divided again after that.

Answer:

You can talk to me

Step-by-step explanation:

Answer:

sure

Step-by-step explanation:

Answer/Step-by-step explanation:

Let x hours be the number of hours Issac worked

    x+6 hours be the number of hours Ruby worked

   4(x+6) hours be the number of hours Svetlana worked.

x + x + 6 + 4(x+6) = 126

x + x + 6 + 4x +24 = 126

                  6x +30 = 126

                         6x = 96

                           x = 16

Therefore, Issac worked 16 hours.

                 Ruby worked 16+6 = 22 hours

                 Svetlana worked 22 × 4 = 88 hours.

If helpful, please mark as brainliest! =)

Answer: Ruby: 22 hours, Isaac: 16 hours & Svetlana: 88 hours.

Step-by-step explanation:

Let's begin by assigning letters to represent our unknowns:

R (hours Ruby worked)

I (hours Isaac worked)

S (hours Svetlana worked)

Now let's see if we can express all three unknowns in terms of one unknown, according to the facts given in the problem:

R = I + 6 (Ruby worked 6 more hours than Isaac)

S = 4R (Svetlana worked 4 times more hours than Ruby)

We can see that we can express the hours Isaac worked in terms of Ruby:

R = I + 6, therefore, I = R - 6

Now we have all three unknowns expressed in terms of one unknown (R). Now we can write an equation to express the given sum of their worked hours (126) in terms of our expressions for one unknown (R):

R + (R - 6) + 4R =126

Now let's solve our equation for the value of R and then use our expressions for R to calculate the values for I and S:

R + R - 6 + 4R = 126

6R - 6 = 126

6R = 126 + 6

6R = 132

R = 132/6

R = 22 (hours Ruby worked)

I = R - 6

I = 22 - 6

I = 16 (hours Isaac worked)

S = 4R

S = 4(22)

S = 88 (hours Svetlana worked)

Answer:

To solve for the unit rate, know that the final answer must be out of 1. Or it is the quantity or amount of something per unit of measurement.

For instance in the above question, the unit rate for 32 teams in 4 divisions would be 8 teams per division.

Likewise for the other question it would be 270/15.

Step-by-step explanation:

now gimme brainlest plzzzzzz

Answer:

show the whole pic of explanation

Answer:

20

...........

mark me as brainlist

Im sorry i do not have the answer but this is the image for who ever that can help

Answer:

1

Step-by-step explanation:

(10^{8})^{2}=10^{16}

10^{16}×10^{0}=1

Answer:

Answer choice B

Step-by-step explanation: 10^8)(10^0)=100000000

100000000=10^10

Try Math papa next time and round on math-way

Answer:

B, an = 4n - 9

Step-by-step explanation:

The sequence is for every time the exponent on a goes up one, the number that it equals to goes up by 4. So to find the nth term, we at 4 to n. I hope this helped! :)

Answer:

no

Step-by-step explanation:

to be proportional, every step of 1 in the upper row, must equal an equal step in the lower row.

from 1 to 2: +15

from 2 to 3: +18

not the same so not proportional

Answer:

10 over 100 multiply by Rs 50000 over 1

.: cut 2 zeros ( 0 ) from 100 and cut 2 ( zeros ) from Rs 50000

.: 10 over 1 by Rs 500 over 1

.: 10 multiply RS 500 = 5 000

His / her increment = RS 5 000

Answer:

True false true

Step-by-step explanation:

I think so

Answer:

The river is 3.15 feet deep.

Step-by-step explanation:

First let's recognize what we need to find: the depth of the river

We know last year the river was 4.2 feet deep, but it dropped 25%. This means we also need to find how much it dropped. To find this, we need to know what 25% of 4.2 is. Write an equation for this.

y = 25% of 4.2

y = 0.25 • 4.2

y = 1.05

This means that the river dropped 1.05 feet. To know its depth now, we need to subtract 1.05 from 4.2. Write an equation for this.

d = 4.2 - 1.05

d = 3.15

The river is 3.15 feet deep.

Hope this helps!

Answer:

x=11

Step-by-step explanation:

the angles shown are supplementary so they will add up to equal 180 so we write the equation 180=5x+10x+15 and solve for x

step 1 combine like terms

180=15x+15

step 2 subtract each side by 15

165=15x

step 3 divide each side by 15

x=11

Answer:

(2, - 5 )

Step-by-step explanation:

Given the 2 equations

y = - 3x + 1 → (1)

4x + y = 3 → (2)

Substitute y = - 3x + 1 into (2)

4x - 3x + 1 = 3

x + 1 = 3 ( subtract 1 from both sides )

x = 2

Substitute x = 2 into (1) for corresponding value of y

y = - 3(2) + 1 = - 6 + 1 = - 5

solution is (2, - 5 )

Jane gets 5,760.

Commissions are a form of variable-pay remuneration for services rendered or products sold.

Given:

House sold for $160,000 with a listing commission of 6%

So, full commission

=160,000*0.06

= 9, 600

And, jane's share will be

=9600 * 0.60

=5,760

Hence, jane's share will be 5,760.

Learn more about this concept here:

https://brainly.com/question/17192715

#SPJ2

Answer:

300°

Step-by-step explanation:

Subtract 360° from 1020° and repeat until angle is in required range

1020° - 360° = 660°, then

660° - 360° = 300°

300° is coterminal with 1020°

An angle between 0° and 360° that is coterminal with 1020° is 300°.

Coterminal angles are defined as the angles which has the same terminal side with the initial side on the positive side of X axis.

We have to find an angle between ° and 360° that is coterminal with 1020°.

Subtract 360° from the given angle until the angle obtained is between 0° and 360°.

1020 - 360 = 660

660 - 360 = 300

So 300° is a coterminal angle with 1020.

Hence the coterminal angle is 300°.

Learn more about CoTerminal Angles here :

https://brainly.com/question/28978650

#SPJ2

Answer: C. 6

Step-by-step explanation:

Rephrase the expression

6÷8-2+5×20

6-8÷2×5+20

Do division

6-4×5+20

Do multiplication

6-20+20

Do subtraction

-14+20

Do addition

6

Hope this helps!! :)

Please let me know if you have any questions

Answer:

(C) 6

Step-by-step explanation:

Have a great day

Answer:

$8.90

Step-by-step explanation:

first you have to subtract how much money you get for overtime, 516.20-160.20=356.00 Next you have to divide 356.00 by 40 to find per hour, 356.00/40=8.90.

Note how going from R to S to T to U has us going counterclockwise. In contrast, going from R' to S' to T' to U' has us going the opposite direction going clockwise. This change in orientation strongly implies that a reflection has been done. Reflections always flip orientation.

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

Here's how we can find the line of reflection.

Draw a line segment from point R to point R'. Mark the midpoint of the segment as point A

Repeat this process to form a segment from S to S'. Mark the midpoint as point B.

The line of reflection will pass through points A and B. This is because the line of reflection is equally distant between the original point (such as point R) and its reflected point (such as R'). This must mean that the line of reflection goes through the midpoint of segment UU' and also segment TT'.

Refer to the diagram below.

Answer:

yikes they're accounts  got deleted✋

Step-by-step explanation: