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Answer: 56

Step-by-step explanation:

Let the number of $5 be x

Let the number of $2 be y.

Based on the information given, we can form an equation as:

x + y = 128 ........ i

5x + 2y = 424 ....... ii

Multiply equation i by 2

Multiply equation ii by 1

2x + 2y = 256 ...... iii

5x + 2y = 424 ....... iv

Subtract iii from iv

3x = 168

x = 168/3

x = 56.

Therefore, there were 56 $5 bills.

Answer:

90 degree

Step-by-step explanation:

because is a lm perpendicular to kn

Answer:

0.15 Per person/number!

Step-by-step explanation:

3liters divided by 20

Answer:

-5/-3

Step-by-step explanation:

first y intercept=

-5/-3

Answer:

13.5 if you round it

Step-by-step explanation:

Find the new amount of people who got the honor role and subtract that from the total. 185-160=25....which is 13.5% of 1185

Answer:

From the left side :

1. X= 60.

2.X= 15.

3.X= 21

Step-by-step explanation:

If u want further explanation , let me know ^^

Good luck ^_^

Answer:

8, 2

Step-by-step explanation:

8 * 2 = 16

8 + 2 = 10

Answer:

step 2

Step-by-step explanation:

Answer:

Step 3

(as a result step 4 is also wrong)

Step-by-step explanation:

22 is wrong

It should be 16 + 18

Entire solution is given below:

[tex]28 \div 7 \times 4 + 18 \\ \\ = 4 \times 4 + 18 \\ \\ = 16 + 18 \\ \\ = 34[/tex]

Answer:

x + 7 > 18

Step-by-step explanation:

Answer:

The answer should be B

Step-by-step explanation:

Assuming x is the 2 then 2+7 should equal 9 and 9 would represent less than the amount Roy wanted to work out which would be the ideal one for him since he wanted to work out less than 18 hours.

Answer: the answer should be -5,-2. I just did that problem

Step-by-step explanation:

Answer

number of side(n)=6

formula to calculate each interior angle =((n-2)×180)/n

now,

((6-2)×180)/6

(4×180)/6

720/6

120

may this will help you

Answer:

120°

Step-by-step explanation:

n = 6

Work:

[tex]\frac{(n-2) *180}{n} \\\\\frac{(6-2) *180}{6} \\\\\frac{4 *180}{6} \\\\\frac{720}{6} \\\\120[/tex]

Answer:

4. (2,1) 5. (-2,1) 6. (8, 80)

Step-by-step explanation:

2x + 4y - 2x + 2y = 8 - 2

6y = 6

y = 1

2x + 4 = 8

2x = 4

x = 2

(2,1)

3x + 4y + 6x - 4y = -2 - 14

8x = -16

x = -2

-6 + 4y = -2

4y = 4

y = 1

(-2,1)

multiply first equation by 4

4y = 40x

4y + 40x + 6y = 40x + 800

10y = 800

y = 80

80 = 10x

x = 8

(8, 80)

Answer:

x=-0.6

Step-by-step explanation:

-3x-3=-1

-3x=-1+3

-3x=2

x=-2/3

Answer:

-2.1 so you divide 6.3 and -3 and then boom that your answer

Answer:

[tex]x=-2.1[/tex]

Step-by-step explanation:

1. Solve the equation using division

[tex]\frac{-3}{-3} x=\frac{6.3}{-3}[/tex]

2. Solve equation

[tex]x=-2.1[/tex]

3. Check answer

[tex]-3(-2.1)=6.3\\6.3=6.3[/tex]

Answer:

x = -5

Step-by-step explanation:

Angles "50" and "x+55" are alternate interior angles which means that they are the same.

So 50 = x + 55

That leaves you with x = -5

Answer:

24, 21, 15, 12

Step-by-step explanation:

Since x is given in the table, you can find the y-values by plugging each of the x-value into the equation replacing x.

[tex]y=30-3(2)=30-6=24[/tex]  [tex](2, 24)[/tex]

[tex]y=30-3(3)=30-9=21[/tex]  [tex](3, 21)[/tex]

[tex]y=30-3(5)=30-15=15[/tex]  [tex](5, 15)[/tex]

[tex]y=30-3(6)=30-18=12[/tex]  [tex](6, 12)[/tex]

9514 1404 393

Answer:

  see attached

Step-by-step explanation:

It is convenient to let a spreadsheet or graphing calculator do the repetitive arithmetic.

__

If you want to do it by hand, put the x-value in the equation and do the arithmetic. For example, ...

  y = 30-3(2) = 30 -6 = 24 . . . for x=2

Answer:

negative

Step-by-step explanation: it has negative signs

Answer:

No, Estelle made a mistake in step 2

Step-by-step explanation:

Answer:

x=8 y=9

Step-by-step explanation:

Answer:

x

=

−

3

and

y

=

2

.

Solve

x

+

5

y

=

7

for

x

.

x

=

7

−

5

y

Substitute

7

−

5

y

for

x

into the other equation.

2

(

7

−

5

y

)

+

7

y

=

8

=

14

−

10

y

+

7

y

=

8

'

14

−

3

y

=

8

Subtract

14

from both sides.

−

3

y

=

−

6

Divide both sides by

−

3

.

y

=

2

Substitute

2

for

y

in the first equation.

x

+

5

(

2

)

=

7

=

x

+

10

=

7

Subtract

10

from both sides.

x

=

−

3

Check by substituting

−

3

for

x

and

2

for

y

into both equations.

2

x

+

7

y

=

8

=

2

(

−

3

)

+

7

(

2

)

=

8

=

−

6

+

14

=

8

=

8

=

8

Check.

x

+

5

y

=

7

=

−

3

+

5

(

2

)

=

7

=

−

3

+

10

=

7

=

7

=

7

Check.

Sorry if I'm wrong

Answer:

w = 8

Step-by-step explanation:

4w+6=38

subtract 6 from each side of the equation:

4w = 32

divide both sides by 4:

w = 8

Answer:

4w+6=38

4w=38-6

4w=32

w=32/4

w=8

Answer:

Andrés tiene 15 años y Alex tiene 12 años.

Step-by-step explanation:

Como el enunciado dice que dentro de 3 años, la edad de Alex será la edad que tiene ahora Andrés puedes escribir una ecuación que indique que la edad de Andrés es igual a la edad de Alex más 3:

x=y+3, donde:

x es la edad de Andrés

y es la edad de Alex

Además, como se indica que dentro 9 años, la edad de Andrés será el doble de la edad que Alex tiene ahora puedes escribir una ecuación que indique que la edad de Andrés más 9 es igual a dos veces la edad de Alex:

x+9=2y

Ahora puedes reemplazar x=y+3 en x+9=2y y despejar y:

y+3+9=2y

12=2y-y

y=12

Finalmente, puedes reemplazar el valor de y en x=y+3 para encontrar el valor de x:

x=y+3

x=12+3

x=15

De acuerdo a esto, la respuesta es que Andrés tiene 15 años y Alex tiene 12 años.

Answer:

a

Step-by-step explanation:

Probabilty usally ends in a %

if probability of a coin landing on heads is 50% and if and

a doesnt describe probability which is why a should be the anwser

though d says 120% the person running the race has full convidence describing themselves that they will win

a doesnt describe any probability it just says 1!! but thats why a is the anwser because its inncorrect!

Answer:

18

Step-by-step explanation:

just add them unless you have to find the numbers for the 2 little squares

Answer:

27

Step-by-step explanation:

cut shapes. then 6x2 is 12, 3x5 is 15, then add