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Alexus [3.1K]
2 years ago
10

Please help! 3x^2 + 1/2 x 7y (When y = 3)

Mathematics
2 answers:
Sholpan [36]2 years ago
7 0
Factoring the equation:

3x^2 + 1/2 x 7(3)

3x^2 + 1/2 x 21

3 (x^2 + 1/2 x 21)

3 (x^2 + 7/2)

3 x 1/2 (2x^2 +7)

3/2 (2x^2 + 7)
mafiozo [28]2 years ago
4 0

Answer:

3x^2+21/2

Step-by-step explanation:

3x^2+1/2*7(3)

(a)=a so (3)=3

3x^2+1/2*7*3

1/2*7*3=21/2

3x^2+21/2

Hope this helps! Pls give brainliest!

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Which of the following improper fractions is equivalent to the mixed number 4 2\3 ?
Alex787 [66]
The improper fraction form of 4 2/3 would be 14/3, if that is one of the choices.
4 0
4 years ago
Read 2 more answers
45 is 90% of what number
choli [55]
45 = 90% * x
45 = .90x
45/.90 = x

x = 50

45 is 90% of 50
8 0
4 years ago
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If 2a-b:2a+b=1:2find the value of a:b​
weqwewe [10]

Answer & Step-by-step explanation:

2a - b : 2a + b = 1 : 2

2a - b = 1

-                         Elimination

2a + b = 2

-b - (b) = -1

-2b = -1

b = 0.5

---------------------------------------------------------------------------------

2a + b = 2           Substitution

2a + 0.5 = 2

2a = 1.5

a = 0.75

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a:b

0.75 : 0.5

or

3/4 : 1/2

Hope this helps!!!

 

3 0
3 years ago
Two-fifths of the students in 6th grade are in the band, Of these, one-
Gelneren [198K]

Answer:

1/10 or 10%

Step-by-step explanation:

1/4 x 2/5 = 1/10 (10%)

3 0
3 years ago
Solve the equation for x.<br> 2/3x-1/9x+5=20
Over [174]

Answer:

x = 27

Step-by-step explanation:

I'm assuming the equation looks like this:

\frac{2}{3}x-\frac{1}{9}x+5=20

Here's how to solve for x:

\frac{2}{3}x-\frac{1}{9}x+5=20

(subtract 5 from both sides)

\frac{2}{3}x-\frac{1}{9}x=15

(Find the GCF of 3 and 9, which is 3. Multiply 2/3 by 3/3. You get 6/9)

\frac{6}{9}x-\frac{1}{9}x=15

(add like terms)

\frac{5}{9}x=15

(multiply 9/5 to both sides, which is the same as dividing both sides by 5/9)

x = 27

Hope it helps (●'◡'●)

8 0
3 years ago
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