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Stolb23 [73]
3 years ago
10

Olga says: If you subtract 8 from

Mathematics
1 answer:
alexandr402 [8]3 years ago
7 0

Answer: 1.5

Step-by-step explanation: Reverse the equation to get the answer.

-13 divided by 2 is -6.5

add 8 and you'll get 1.5

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(a-b) ( a+b) simplify​
BlackZzzverrR [31]

Answer:

a^2 - b^2

Step-by-step explanation:

1. (a)(a)+(a)(b)+(-b)(a)+(-b)(b)

2. a^2 + ab - ab - b^2

3. a^2 - b^2

4 0
3 years ago
Solve the simultaneous equation<br> X+3y=13<br> X-y=5
Andru [333]

Answer:

x = 7

y = 2

Step-by-step explanation:

In the above question, we are given 2 equations which are simultaneous. To solve this equation, we have to find the values of x and y

x + 3y = 13 ........ Equation 1

x - y = 5...........Equation 2

From Equation 2,

x = 5 + y

Substitute 5 + y for x in Equation 1

x + 3y = 13 ........ Equation 1

5 + y + 3y = 13

5 + 4y = 13

4y = 13 - 5

4y = 8

y = 8/4

y = 2

Since y = 2, substitute , 2 for y in Equation 2

x - y = 5...........Equation 2

x - 2 = 5

x = 5 + 2

x = 7

Therefore, x = 7 and y = 2

5 0
3 years ago
BRAINLIEST<br> Is the function of presented by the table linear or nonlinear and why?
Aloiza [94]

Answer:

it is a linear function because the x value doesn't repeat

Step-by-step explanation:

5 0
3 years ago
A circle has its center at (-1, 2) and a radius of 3 units. What is the equation of the circle? (1 point) (x - 1)2 + (y + 2)2 =
Nina [5.8K]

Answer:

(x + 1)^2 + (y - 2)^2 = 3^2 = 9

Step-by-step explanation:

The standard equation of a circle with center at (h, k) and radius r is

(x - h)^2 + (y - k)^2 = r^2.

Here, h = -1, k = 2 and r = 3, so the equation of this particular circle is

(x + 1)^2 + (y - 2)^2 = 3^2 = 9.

8 0
3 years ago
David can paint a fence in ten hours. Alex can paint the same fence in eight hours. If
xxTIMURxx [149]

Answer:

40/9

Step-by-step explanation:

Use the work formula, \frac{1}{A} + \frac{1}{B} = \frac{1}{T}, where A is the amount of time it takes one person, B is the amount of time it takes another person, and T is the time it takes for them to work together.

Plug in the times for David and Alex alone:

\frac{1}{10} + \frac{1}{8} = \frac{1}{T}

Find the least common denominator, which is 40.

\frac{4}{40} + \frac{5}{40} = \frac{1}{T}

\frac{9}{40} = \frac{1}{T}

Cross multiply and solve for T:

9T = 40

T = 40/9

So, if they worked together, it would take them 40/9 hours

3 0
3 years ago
Read 2 more answers
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