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KIM [24]
3 years ago
10

Evaluate 2x + 1 when x = 7.

Mathematics
2 answers:
Tatiana [17]3 years ago
8 0

Answer:

15

Step-by-step explanation:

Leya [2.2K]3 years ago
4 0

Step-by-step explanation:

When x = 7

2x + 1

= 2 * 7 + 1

= 14 + 1

= 15

Hope it will help :)

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Add the two expressions.<br><br> −4x+3 and 2x−6<br><br> Enter your answer in the box.
BlackZzzverrR [31]
First, you set your problem up like this: 

-4x+3=2x-6

add 6 to both sides so it looks like this:

-4x+9=2x

add 4x to both sides so it looks like this:

9=6x

divide 6 from both sides so this is your answer:

1.5=x
5 0
3 years ago
Read 2 more answers
Emily's family loves to work together in the garden. They have a slight preference for flowers, as 60%, percent of their plants
murzikaleks [220]

That is 40% * 50

= 0.4 * 50

= 20 vegetables

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3 years ago
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Anna has 4 bags of 100 crackers, bags of 10 crackers, and 3 crackers that aren’t in bags. How many crackers does she have
sweet-ann [11.9K]

Answer:1,100??

Step-by-step explanation:

6 0
3 years ago
Determine the astm grain size number if 33 grains per square inch are measured at a magnification of 270×
strojnjashka [21]
8.9

The equation for the grain size is expressed as the equality:
Nm(M/100)^2 = 2^(n-1)
where
Nm = number of grains per square inch at magnification M.
M = Magnification
n = ASTM grain size number

Let's solve for n, then substitute the known values and calculate.
Nm(M/100)^2 = 2^(n-1)

log(Nm(M/100)^2) = log(2^(n-1))
log(Nm) + 2*log(M/100) = (n-1) * log(2)
(log(Nm) + 2*log(M/100))/log(2) = n-1
(log(Nm) + 2*log(M/100))/log(2) + 1 = n

(log(33) + 2*log(270/100))/log(2) + 1 = n
(1.51851394 + 2*0.431363764)/0.301029996 + 1 = n
(1.51851394 + 0.862727528)/0.301029996 + 1 = n
2.381241468/0.301029996 + 1 = n
7.910312934 + 1 = n
8.910312934 = n

So the ASTM grain size number is 8.9

If you want to calculate the number of grains per square inch, you'd use the
same formula with M equal to 1. So:
Nm(M/100)^2 = 2^(n-1)
Nm(1/100)^2 = 2^(8.9-1)
Nm(1/10000) = 2^7.9
Nm(1/10000) = 238.8564458
Nm = 2388564.458

Or about 2,400,000 grains per square inch.
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3 years ago
Barney wants to rent a tent. He has to pay a fixed base cost plus a daily rate for renting the tent. The table shows the amount
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3 18 shows the relationship between x and y
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