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anzhelika [568]
3 years ago
5

What is 21(2-x)+12x=44

Mathematics
1 answer:
Sedaia [141]3 years ago
4 0
21(2-x)+12x=44    21x2=42  21x-x=21x
42-21x+12x=44    -21x + 12x= -9x
42-9x=44
-42       -42
9x=2                      9x/9=x  2/9=4.5
x=4.5


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Lin has 4 pinecones and some acorns.
frozen [14]

Answer:

Lin has 11 acorns ⇒ answer D

He subtract 4 from 7 instead of add 4 to 7

Step-by-step explanation:

- Lin has 4 pinecones and some acorns

- She has 7 fewer pinecones than acorns

- The meaning of 7 fewer pinecones than acorns is the number of the

   pinecones is less than the number of acorns by 7

∵ She has 4 pinecones

∵ She has 7 fewer pinecones than acorns

- The number of pine cones is less than the number of acorns by 7

∴ 4 = number of acorns - 7

- Add 7 to both sides

∴ 11 = number of acorns

*<em> Lin has 11 acorns</em>

- Tom choose answer A which is 3

- He made a mistake in the equation

- He put  ⇒ number of the acorns = 7 - 4 not 7 + 4

∴ number of acorns = 3

* <em>He subtract 4 from 7 instead of add 4 to 7</em>

8 0
4 years ago
PLEASE HELP!!!!<br><br> Find the value of x.<br> 130 degrees<br> Xdegrees
strojnjashka [21]

Answer:

25

Step-by-step explanation:

130+25+25=180

..........

.....

3 0
3 years ago
Read 2 more answers
Which of these rational numbers is also an integer?
dexar [7]

Answer:

6/3

Step-by-step explanation:

An integer is a whole number, that is not a fraction. All of the numbers are fractions, but if you simplify them, you see that 6/3=2. 2 is a whole number, and therefore an integer.

3 0
3 years ago
Read 2 more answers
What is the value of x in the triangle?
yulyashka [42]
<h3>Answer: C) x = 13</h3>

====================================================

Work Shown:

We have a right triangle with legs a = 5 and b = 12. The hypotenuse is c = x which is unknown for now.

Use the pythagorean theorem to find x.

a^2 + b^2 = c^2

5^2 + 12^2 = x^2

25 + 144 = x^2

169 = x^2

x^2 = 169

x = sqrt(169)  .... apply the square root to both sides

x = 13

4 0
3 years ago
Y= 0.26x + 4.4*10^-4
Temka [501]

Y= 0.26x+4.4*10^-4

Y= 0.26x+4.4*10,000

Y=0.26x+44,000


I'm not sure if you were only trying to simplify the problem, but I hope this helped

6 0
3 years ago
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