True or false. The solution to an equation in two variables such as y = 3x - 9 is the value of x that makes the equation true.

Answer:

You can't solve this unless you have the amount of the other alloy.

Step-by-step explanation:

For example, the question should be something like:

A jeweler is using 10 pounds of alloy that is 2% platinum. He has another alloy that is 5% platinum. He wishes to combine these mixtures to form a mixture that is 3% platinum. How many pounds of the second alloy should be added to the first to get a mixture that is 3% platinum?

Answer:

let the first no. be x

then the second no. = x - 6

their sum is 48

therefore,

[tex] = > x + (x - 6) = 48 \\ = > 2x = 48 + 6 \\ = > 2x = 54 \\ = > x = \frac{54}{2} \\ = > x = 27[/tex]

The value of first no. = x = 27

The value of second no. = x - 6 = 27 - 6

= 21

Answer:

D 60

Step-by-step explanation:

f(5)=35

f(6)=40

f(7)=45

f(8)=50

f(9)=55

f(10)=60

Answer:

d 60

Step-by-step explanation:

Answer:

I think X=3

Step-by-step explanation:

When adding fractions you have to find a common  denominator, the easiest way is to use the other number for it. So with [tex]\frac{x}{2}[/tex] you would multiply the top and bottom by 6, and with [tex]\frac{x}{6}[/tex] you would multiply both the top and bottom by 2. You should then have [tex]\frac{6x}{12}[/tex]+[tex]\frac{2x}{12}[/tex]. You add the tops together which will leave you with 8x and the bottom stays the same. Then you multiply the the 2 by the 12, and when doing this the 12 will cancel out. leaving you with 8x= 24. Finally you divide 24 by 8 and X is 3.

Answer:

86,000

Step-by-step explanation:

You look at the 88 and 88 would round up to one, but since 1 is less than four the number becomes 86,000

Answer:

26 feet, Oliver will have to travel 26 feet deep.

Step-by-step explanation:

8 feet added to 18 feet will be your answer.

Answer:26 feet, Oliver will have to travel 26 feet deep.

Step-by-step explanation:Okay so if you draw a line graph going vertical and you number it 1-32 ( this is if you have to show work ) a is a 11 feet deeper and b is 23 feet deeper

Given:

Newton has 10 more dimes than nickels.

He has  twice the number of quarters than nickels.

Total amount he has = $6.20.

To find:

The number of each coin.

Solution:

Let the number of nickels be x.

Newton has 10 more dimes than nickels.

Dimes = x+10

He has  twice the number of quarters than nickels.

Quarters = 2x

We know that, 1 nickel = $0.05, 1 dime = $0.10 and 1 quarter = $0.25.

Total amount he has is $6.20.

[tex]x\times 0.05+(x+10)\times 0.10+2x\times 0.25=6.20[/tex]

[tex]0.05x+0.10x+1+0.50x=6.20[/tex]

[tex]0.65x=6.20-1[/tex]

[tex]0.65x=5.20[/tex]

Divide both sides by 0.65.

[tex]x=\dfrac{5.20}{0.65}[/tex]

[tex]x=8[/tex]

Now,

Number of nickels = 8

Number of dimes = 8 + 10 = 18

Number of quarters = 2(8) = 16

Therefore, the number of nickels, dimes and quarters are 8, 18 and 16 respectively.

Answer:

trinomial

Step-by-step explanation:

Since this polynomial has 3 different terms, this is, in fact, a trinomial.

Hope this helps :)

Answer:

The y-intercept is (0,-6), but the way they want it written the answer is y intercept= -6

Step-by-step explanation:

Answer:

79

Step-by-step explanation:

From Question, we are told that, there are 14 rows of seat with is divided into left hand side and right hand side

Seats by the right = fit two people

Seats by the left = fit three people

This means, 1 row of seat can contain 5 persons

The back seat = 8 people can sit comfortably.

Hence, the number of people that can ride the bus at one time =

(14 × 5 people) + 8 people (backseat) + 1 driver

= 70 + 8 + 1

= 79 people

Answer:

60 cm

Step-by-step explanation:

remember, the area of a triangle is found by

1/2 b h

or half of the base times the height

so using that plug in the values:

the base is made of two 5s;  2* 5 is 10 so the base is 10cm long

the height is 12cm

so

1/2 * 12 * 10

= 6 * 10

= 60

Answer:

I think its 60

Step-by-step explanation:

To find the area of a triangle you do (height x base) divided by 2

5+5=10

12 x 10 = 120

120 divided by 2 is 60

Answer: 30

Step-by-step explanation:

100-70=30

Answer:

Step-by-step explanation:

5x + 3 > 48

5x > 48 - 3

5x > 45

x > 45/ 5

x > 9

Answer:

x = 9

Step-by-step explanation:

5x + 3 > 48

Subtract 3 to both sides

5x > 45

Divide by 5 to both sides

x = 9

To check if the answer is correct, you can always plug in 9 instead of x and solve the equation.

Hope this helps and pls do mark me brainliest if you can:)

Answer:

7 * x = 5 + y

Step-by-step explanation:

hope this helps!, you can correct me if I'm wrong.

Answer:

x=17.2

Step-by-step explanation:

here a picture of how i did it cause its hard to expialn

Answer:

6

Step-by-step explanation:

it would be six in one hour he would clean 2 houses in two 4 houses then in three it would be six

Answer:

I think you can clean 6 houses.

Answer:

see explanation

Step-by-step explanation:

(a)

There is a common difference d between consecutive terms, that is

d = 12 - 0 = 24 - 12 = 36 - 24 = 48 - 36 = 12

This indicates the sequence is arithmetic with common difference 12

(b)

To obtain the next term add 12 to the previous term, that is

48 + 12 = 60 and 60 + 12 = 72

The next 2 terms in the sequence are 60 and 72

Answer:

if it easy math you do it = 12 times

Step-by-step explanation:

12 24 36 48 / 60 72 84 96  108 120 132 144

Answer:

B) y-3= -7(x+1)

Step-by-step explanation:

Answer:

Area = [tex]156cm^{2}[/tex]

Step-by-step explanation:

A=a+b

2h=13+13

2·12=156cm²

I hope this helps you :)

Answer:

n  n n n n n n n n  

Step-by-step explanation:

b b b  b b b b b b b  b b b b b b b

Answer:

X equals 5

Step-by-step explanation:

3x+1=5x-9

3(5)+1=5(5)-9

15+1=25-9

16=16

Answer:

5$ is discounted from the regular price.

The equation for the problem is [tex]0.25x[/tex] ≤ [tex]3.65[/tex]

Hope it helps!

You can make the maximum number of copies would be 14.6 which is determined by the inequality 0.25x ≤ 3.65 where x represents the number of copies.

Inequality is defined as mathematical statements that have a minimum of two terms containing variables or numbers that are not equal.

Arithmetic operations can also be specified by subtracting, dividing, and multiplying built-in functions. The operator that performs the arithmetic operation is called the arithmetic operator.

You have at most $3.65 to make copies for a school project. Each copy costs $0.25 which is given in the question.

As per the given condition, the required inequality would be:

⇒ 0.25x ≤ 3.65

Here x represents the number of copies

⇒ 0.25x ≤ 3.65

Divided by 0.25 both sides of the inequality, and we get

⇒ x ≤ 3.65/0.25

⇒ x ≤ 14.6

Therefore, you can make the maximum number of copies would be 14.6.

Learn more about inequalities here:

brainly.com/question/20383699

#SPJ2

Answer:

5 times 6 plus 1 is equal to 31. so the answer is 6

Step-by-step explanation:

5*x+1=31

31-1=30

30/5=6

Answer: 6

Step-by-step explanation: The equation is 5x+1=30

-1 -1

5x=30

X=6

Answer:

its 60

Step-by-step explanation: