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3 years ago

How can I solve this equation 6+7x=55

2 answers:

7 0

You could solve it with these two steps:

#1). Subtract 6 from each side of the equation.
and then
#2). Divide each side by 7.

If you'll do that, the solution will be right there on the paper in front of you.
It'll begin with "x =", and right after that will be the value of 'x'.

Helen [10]3 years ago

7 0

6+7x=55
-6 -6
7x=49
7x/7 and 49/7

x=7

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Nine voltage measurements in a circuit have produced the following values: 12.09, 12.05, 11.94, 11.99, 12.12, 12.05, 12.02, 11.9

Debora [2.8K]

Answer:

we can not reject any value

Step-by-step explanation: From data we can test the highest and the lowest value to evaluate if one of these values are out of certain confidence Interval

If we established CI = 95 % then α = 5 % and α/2 = 0,025

From data we find the mean of the values

μ₀ = 12,03 and σ = 0,07

From z table we find z score for 0,025 is z(c) = ± 1,96

So limits of our CI are:

12,03 + 1,96 = 13,99

12,03 - 1,96 = 10,07

And all our values are within ( 10,07 , 13,99)

So we can not reject any value

4 0

3 years ago

Solve these inequalities by showing all steps of working b) 5x + 4 < 16 *

Mama L [17]

Step-by-step explanation:

5x+4<16

or,5x<16-4

or,5x<12

or,x<12÷5

or,x<12/5

or,x<2.4

:.x<2.4

6 0

3 years ago

Read 2 more answers

Chandler Heisinger buys a monthly metro card, which entitles him to unlimited subway travel in New York City, for $81 per month.

ANTONII [103]

Let $r$ be the number of rides Chandler takes in a month. Then the cost with the MetroCard is still $81, but the cost without the MetroCard is $2r$ . So we can set up an equation representing what we want: "The cost with a MetroCard of r rides in a month is less than the cost without a MetroCard." In equations,
$81\ \textless \ 2r \\ r\ \textgreater \ 81/2\ \textgreater \ 40 \\
r \geq 41$
Thus, at a minimum, Chandler must take 41 rides for his MetroCard to be cheaper than not having it.

7 0

3 years ago

Angi has 32 nickels and dimes. Their total value is $1.90. How many of each coin does she have?

Radda [10]

Answer:

6 dimes, 26 nickels

Step-by-step explanation:

The number of nickels is N, and the number of dimes is D.

N + D = 32

5N + 10D = 190

N + 2D = 38

D = 6

N = 26

5 0

2 years ago

Someone please help me

Inessa [10]

The answer to the question is B you do not have to sign if you use a pin

8 0

3 years ago