Solve the system by substitution.
Y = 10x
7x + 3y =
37

Answer:

15,6....................

Answer:

£15.6

Step-by-step explanation:

78/5=15.6

Answer:

15

Step-by-step explanation:

1/10 of 50 is 5, so remove that.

2/3 of 45 is 30, so remove that too.

therefore, 15 kids are in school

hope this helps!! <3

Answer:

1/12

Step-by-step explanation:

finding recirocal is basically turning your number into 1. so 12 times 1/12 equals 1.

The reciprocal of 12 is 1/12. 

Hope this helps! :)

Answer:

392 and Overwatch I think

Step-by-step explanation:

Answer:

392 and overwatch, the other guy deleted his answer soo imma hop in here and put the answer.

Step-by-step explanation:

Answer:volts =60v

Step-by-step explanation:

STEP 1

 The voltage across a resistor is directly proportional to the current running through the resistor Is mathematically represented as

V∝ C

introducing the proportion of constant , we have

V=KC

Step 2

When current =12 amps, and volts = 480, we have

V=kC

480=K  X  12

Constant of proportionality ,K= V/C=480/12= 40

Therefore, when current = 1.5 amp, volts=?

V= KC

V= 40  X 1.5

V= 60 volts

Answer:

A

Step-by-step explanation:

y=x+1

=> put y=5

5=x+1

x=5-1

x= 4

(4,5)

same put y=9

so, x= 8

(8,9)

Answer:

Linear equations use one or more variables where one variable is dependent on the other. Almost any situation where there is an unknown quantity can be represented by a linear equation, like figuring out income over time, calculating mileage rates, or predicting profit.

Step-by-step explanation:

You can simplify to 9i/3+9i

Multiply by 3 - 9i / 3 - 9i

You get 27i + 81 / 90

Answer:

Nerys pays 3.1/3.84,5=84,5£per year

Eleri pays 3.84,5=253,5£per year

253,5-84,5=169£ more pay Eleri

Step-by-step explanation:

#1

Equation 1 = 2-6 over 1-3

#2

Equation 1 = 1-4 over 2+3 Because instead of subtracting a negative you can write adding cause the double negative makes a positive

Answer:

253.5 miles

Step-by-step explanation:

This problem can be solved by using the concept of "ratios" and "proportions."

Step 1: Check for the "known" and "unknown" variables.

The known variables are: 5 gallons, 97.5 miles and 13 gallons while the unknown variable is the "number of miles" the car can travel using 13 gallons.

Step 2: It's time to plug the values into the proportion.

            [tex]\frac{5 gallons}{97.5 miles}[/tex] = [tex]\frac{13 gallons}{x miles}[/tex]

Step 3: Solve the proportion.

            [tex]\frac{5}{97.5}[/tex] = [tex]\frac{13}{x}[/tex]  ⇒ 5x = 1,267.5 ⇒ x = 253.5 miles

Answer:

Easy! Answer my question and I'll answer urs! Mine is simple tho. Go on my account and if you answer it I'll send you my reponse to the question. I've wrriten the steps and taken the picture on a paper so pls hurry.

Answer:

10

Step-by-step explanation:

For movie mania:

Sign-up fee = $ 20

Rent for 1 DVD = $ 4.00

For Hurricane video:

Sign-up fee = 0

Rent of 1 DVD = $ 6.

Let [tex]n[/tex] be the number of DVDs to rent in order for both stores to charge the same.

For movie mania, charge to rent [tex]n[/tex] DVDs = Sign-up fee + rent of [tex]n[/tex] DVDs

=20+4n

For Hurricane movie, charge to rent [tex]n[/tex] DVDs = Sign-up fee + rent of [tex]n[/tex] DVDs

=0+6n=6n

Now, for both stores to charge the same, both the charges must be equal, we have

6n=20+4n

[tex]\Rightarrow 6n-4n=20[/tex]

[tex]\Righatarroe 2n=20[/tex]

[tex]\Rightarrow n =20/2=10[/tex]

Hence, the required number of DVDs to rent is 10 in order for both stores to charge the same.

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Work Shown:

A = volume of the cylinder

A = pi*(radius)^2*(height)

A = pi*r^2*h

-----------

The cone's base has diameter r/2, so its radius is (1/2)*(r/2) = r/4

B = volume of the cone

B = (1/3)*(volume of cylinder with radius r/4 and height h)

B = (1/3)pi*(r/4)^2*h

B = (1/3)*pi*(r^2)/(4^2)*h

B = (1/3)*pi*(r^2)/16*h

B = (1/3)*(1/16)*pi*r^2*h

B = (1/48)pi*r^2*h

B = (1/48)*A

B = (1/48)*(volume of cylinder)

-----------

C = volume of the empty space/air inside cylinder, but outside cone

C = A-B

C = A - (1/48)*A

C = (48/48)A - (1/48)A

C = (48A)/48 - (A/48)

C = (48A-A)/48

C = 47A/48

C = (47/48)*A

C = (47/48)*pi*r^2*h

Answer:

x = 4

Step-by-step explanation:

Let's multiply both sides by 5 to get rid of the leading fractions.

5 X 0.2 (4x - 8) = 5 X 0.4(12-2x)

(4x-8) = 2 (12-2x)

4x - 8 = 24 - 4x

8x = 32

x = 4

x = 4

Answer:

-3(-1)=

Step-by-step explanation:

Answer:

Given

Addition

simplify

answer

Step-by-step explanation:

Answer:

1. Given

2.Addition

3. simplify

4. answer

Step-by-step explanation:

Answer:

I am pretty sure its D

Step-by-step explanation:

If u want to be sure tho search up the dilation scale factor on Google:)

Answer:

2/7, 3/7

Step-by-step explanation:

Total outcomes=7

No. 6 outcomes=2

P(E)= Favourable outcomes/total outcomes

    =2/7

Total even no.= 3

∴ P(E)= 3/7

Mark me as brainliest

Answer:

y=-4x-4

Step-by-step explanation:

-2,4

4,-20

-20-4 is -24

4--2

6

-24/6 is -4 (slope)

4=-2*-4+b

4=8+b

-4=b (y intercept)

Answer:

She put in $7.50

Step-by-step explanation:

Answer:

$13.77

Step-by-step explanation:

12.99 x 0.06

0.7794

0.7794+12.99

13.7694

$13.77

Answer: Undefined or 0

Step-by-step explanation: Y=3 means there would just be a straight line across on (0,3) and when the slope and rise is 0 it means there is no slope or it is undefined

Answer:

En cada recipiente grande coloco 1.8 kilos de frijoles y en el recipiente pequeño coloco 0.9 kilos.

Step-by-step explanation:

dividio los frijoles en 3 recipientes

volumen total de los 4 recipientes = 2x + 2x + x = 5x

esto se debe a que los 2 mas grandes tenian el mismo tamaño (2x), mientras que el pequeño tenia solo la mitad (x)

4.5 kilos de frijoles / 5 x

x = 0.9 kilos de frijoles

recipiente grande = 2 · 0.9 = 1.8 kilos

Step-by-step explanation:

2 1/3

=2*3+1/3

=7/3

Answer:

for pulling out a killer kiwi it would be 5/15 and 9/15 for crazy coconut

Answer:

21

Step-by-step explanation:

because on a table, -21 and 21 are lined up together.