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san4es73 [151]
3 years ago
6

What is the value of 6x+5y​

Mathematics
1 answer:
sertanlavr [38]3 years ago
5 0

Answer:

set value to x and y

Step-by-step explanation:

1. set a value to x and y

You might be interested in
The length of a rectangle is 3 centimeters less than four times its width. Its area is 10 square centimeters. Find the dimension
Kay [80]

Answer:

W = 2 cm

L = 5 cm

Step-by-step explanation:

A rectangle is a four sided shape with 4 perpendicular angles. It has two pairs of parallel sides which are equal in distance: width and length. Its area, the amount of space inside it, can be found using the formula A = l*w. If the area is 10 cm² and the length is "3 cm less than 4 times the width" or 4w - 3, you can substitute and solve for w.

A = l*w

10 = (4w - 3)(w)

10 = 4w² - 3w

Subtract 10 from both sides to make the equation equal to 0. Then solve the quadratic by quadratic formula.

4w² - 3w - 10 = 0

Substitute a = 4, b = -3 and c = -10.

w = \frac{3 +/- \sqrt{(-3)^2 - 4(4)(-10)} }{2(4)} = \frac{3 +/- \sqrt{9 +160)} }{8} =  \frac{3 +/- \sqrt{169} }{8} = \frac{3+/-13}{8}

There are two possible solutions which can be found.

3 + 13 / 8 = 16/ 8 = 2

3 - 13 / 8 = -10/8 = -5/4

Since w is a side length or distance, it must be positive so w = 2 cm.

If the width is 2 cm then the length is 4(2) - 3 = 8 - 3 = 5 cm.

8 0
2 years ago
Just need the answers to see if im right lol
denis-greek [22]

Answer:

what is the question ? Volume or surface area???

6 0
3 years ago
Solve the simultaneous equations:<br><br> 3a-2b=14 <br> 12a+9b=39
kirill [66]
Use elimination
Multiply first equation by 4
12a - 8b = 56
12a + 9b = 39
Subtract both
-17b = 17
b = -1
Plug in -1 for b
3a - 2(-1) = 14
3a = 12, a = 4
Final answer: a = 4, b = -1
5 0
2 years ago
What is the equation in standard form of the line that passes through the point (4, -8) and
Delvig [45]

Answer:

A

Step-by-step explanation:

Plug in values

We know that x=4 and y= -8

just plug in numbers until one is correct

4-4(-8)=36

4+32=36

36=36

the answer is A

6 0
2 years ago
48/4 as a mixed number? Please help!
LenaWriter [7]

Answer:

12 is the answer

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
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