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alexandr402 [8]
2 years ago
15

Solve for x.

Mathematics
1 answer:
Ivanshal [37]2 years ago
8 0

Answer:

x = -3.25

Step-by-step explanation:

2/5 = 0.4

0.4x - 0.2 = -2(3/4)

-2(3/4) = -2/1 * 3/4 = -6/4

0.4x - 0.2 = -6/4

Convert to fraction

2/5x - 1/5 = -6/4

Add 1/5 to both sides

-6/4 + 1/5 = -30/20 + 4/20 = -26/20

2/5x = -26/20

Convert to decimal

0.4x = -1.3

-1.3/0.4 = -3.25

x = -3.25

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Find the number of boxes needed, x, for 42 granola bars. ​
serg [7]

The question is incomplete:

Find the number of boxes needed, x, for 42 granola bars. ​

The table with the information is attached.

Answer:

The number of boxes needed for 42 granola bars is 7.

Step-by-step explanation:

Since the table shows that for 12 granola bars 2 boxes are needed, you can use a rule of three with this information to find the number of boxes needed for 42 granola bars:

12 granola bars  → 2 boxes

42 granola bars →      x

x=(42*2)/12

x=84/12

x=7

According to this, the answer is that the number of boxes needed for 42 granola bars is 7.

8 0
3 years ago
Solve the system of equations - 6x + 5y = 0 and -5x + 5y = -5 by combining
Anna [14]

9514 1404 393

Answer:

  (x, y) = (-5, -6)

Step-by-step explanation:

The coefficients of y are the same, so we can eliminate y by subtracting one equation from the other. Here, we choose to subtract the first from the second, so that the coefficient of x ends up positive.

  (-5x +5y) -(-6x +5y) = (-5) -(0)

  x = -5 . . . . . . simplify

  -6(-5) +5y = 0 . . . . . . substitute x into the first equation

  6 +y = 0 . . . . . . . . . .  divide by 5

  y = -6 . . . . . . subtract 6

The solution to the system of equations is (x, y) = (-5, -6).

7 0
2 years ago
Jackie worked 7.5 hours yesterday. If she earns $8.05 an hour, how much did she earn yesterday?
sladkih [1.3K]
Answer 60.375
Explanation
All you do is multiply 7.5 by 8.05 which gets you 60.375
4 0
3 years ago
Read 2 more answers
6x=12 with explanation plz
lord [1]

Answer:

X = 2

Step-by-step explanation:

6(2) = 12

6 X 2 = 12

4 0
2 years ago
Help please...... ...
Ket [755]
7&8 if u draw it out first it'll help by tons
5 0
3 years ago
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