I need help please please

Mathematics

1 answer:

Westkost [7]3 years ago

6 0

The answer is four .......

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Answer all three please having trouble

Alona [7]

Answer:

1) b 243

Sorry, I couldn't figure out the other two..

Step-by-step explanation:

3 0

3 years ago

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Multiply.

Kamila [148]

Expand the following:
(x - 6) (3 x^2 + 10 x - 1)
Hint: | Multiply out (x - 6) (3 x^2 + 10 x - 1).
| | | | x | - | 6
| | 3 x^2 | + | 10 x | - | 1
| | | | -x | + | 6
| | 10 x^2 | - | 60 x | + | 0
3 x^3 | - | 18 x^2 | + | 0 x | + | 0
3 x^3 | - | 8 x^2 | - | 61 x | + | 6:
Answer: 3 x^3 - 8 x^2 - 61 x + 6 Thus B:

7 0

3 years ago

Solve for x 2/(7x) = 6/5 5/21 -21/5 21/5 I don't know - 5/21

djverab [1.8K]

The answer is: [A]: " $\frac{5}{21}$ " .
________________________________________
Given:

2/ (7x) = 6/5;

→ (6/5) * (7x) = 2 ;

42x / 5 = 2 ;

42x = 2*5 ;

42x = 10 ;

42x /42 = 10/42 ;

x = 10/42 = (10÷2) / (42÷2) = 5/21 ;

x = $\frac{5}{21}$ ;

→ which is: Answer choice: [A]: " $\frac{5}{21}$ " .
__________________________________________________

7 0

3 years ago

Simplify the expression 7y+3x+3-2y+6

pishuonlain [190]

Answer:

5y + 3x + 9

Step-by-step explanation:

Whenever something is multiplied by the same variable, you can combine the coefficients. In this case, first you'd move the values with the same variable next to each other, for simplicity:

7y-2y+3x+3+6

Then, combine like terms.

5y+3x+3+6

5y+3x+9

8 0

3 years ago

We have 500 grams of a 10% salt solution. How many grams of water must be added to dulite the solution to form a 4% solution. Sh

lys-0071 [83]

Hmm, one way is this
there's 500 times 0.10 or 50 grams of salt in the water
if we want to make 50 grams=4% of everything, how much water do we need to add

50=4% of all
50=0.04 of all
divide both sides by 0.04
1250=all
so
500+what=1250
minus 500 both sides
what=750

750 grams of water

3 0

3 years ago

Read 2 more answers