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Artist 52 [7]
3 years ago
13

X + 2y = 5

Mathematics
1 answer:
Aneli [31]3 years ago
8 0

Answer:

-5

Step-by-step explanation:

The given system is

x + 2y = 5 \\ x - 3y = 7

The corresponding coefficient matrix is shown in attachment.

The value of the system determinant, is the determinant of the coefficient matrix.

Which is

- 3 \times 1 - 2 \times 1 =  - 5

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The length of your classroom is about 3.5 x 10^2 inches. If the hallway is ten times as long as the classroom, what is the lengt
tatuchka [14]

Answer:

3.5x10^3

Step-by-step explanation:

3.5x10^2 = 350

350x10 = 3500

3500 = 3.5x10^3

8 0
3 years ago
10. Amina is currently twice as old as her younger brother,
maks197457 [2]

Answer:

When Amina is 18. Saad would be;

k. 14

Step-by-step explanation:

Let "x" represent Anita's current age and let "y" represent Saad's current age, we have;

Anita's age = 2 × Saad's age

Therefore;

x = 2 × y...(1)

In 4 years, we will get;

x + 4  = 1.5 × (y + 4)...(2)

Substituting the value of x in equation (1) into equation (2), we get;

2·y + 4 = 1.5·y + 1.5 × 4 = 1.5·y + 6

2·y + 4 = 1.5·y + 6

2·y - 1.5·y   = 6 - 4 = 2

0.5·y = 2

y = 2/0.5 = 4

Saad's current age = y = 4 years

From equation (1), we have;

x = 2 × y = 2 × 4 = 8

Amina's current age = x = 8 years

When Amina is 18, we have;

18 = 10 + 8 = 10 + x

Therefore, Amina would be 18 in 10 years time from now, from which we have;

Saad would be 10 years + y = 10 years + 4 years = 14 years in 10 years from now

Therefore, when Amina would be 18 years in 10 years from now Saad would be 14 years.

6 0
3 years ago
Solve each equation. Show or explain your method. DONT TAKE MY POINTS I WILL GIVE BAINLEST
son4ous [18]

#1

= 9

Let's solve your equation step-by-step.

8.88=4.44(x−7)

Step 1: Simplify both sides of the equation.

8.88=4.44(x−7)

8.88=(4.44)(x)+(4.44)(−7)(Distribute)

8.88=4.44x+−31.08

8.88=4.44x−31.08

Step 2: Flip the equation.

4.44x−31.08=8.88

Step 3: Add 31.08 to both sides.

4.44x−31.08+31.08=8.88+31.08

4.44x=39.96

Step 4: Divide both sides by 4.44.

#2

= y = -3

 

Step 1: Simplify both sides of the equation.  

Step 2: Subtract 2 from both sides.  

Step 3: Divide both sides by 5.

5 0
3 years ago
What is the coefficient of the term 12p in the expression 12p+9q​
Tju [1.3M]

Answer:

12

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
The width of a rectangle is 4x−9.5 feet and the length is 9.5x+10 feet. Find the perimeter of the rectangle.
ipn [44]

Answer:

.037 feet

Step-by-step explanation:

perimeter = the sum of all four sides so

perimeter = (4x-9.5) + (9.5x + 10)  + (4x - 9.5) + (9.5x + 10)  = 27x = 1

therefore x = 1/27  = .037 feet

7 0
3 years ago
Read 2 more answers
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