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Mrrafil [7]
3 years ago
7

Solve for 2 unknowns : 3a+4b=9 ; 2a+2b=6

Mathematics
1 answer:
BARSIC [14]3 years ago
3 0
Let us take the second equation first
2a + 2b = 6
Dividing both sides by 2 we get
a + b = 3
a = 3 - b
Putting the value of a in the first equation we get
3a + 4b = 9
3(3 - b) + 4b = 9
9 - 3b + 4b = 9
b = 9 - 9
   = 0
Now putting the value of b in the second equation we get
a + b = 3
a + 0 = 3
a = 3
So the value of the unknown variable a is 3 and the value of the unknown variable b is 0.

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in a school there are 650 girls. It is 26% of the whole students, how many boys are there in the school?​
worty [1.4K]

Answer:

Step-by-step explanation:

Frt7v6c87buhinjomp,l.;

8 0
3 years ago
The libary has at least 5,000 books witch inequality represent the number of books,b,at the library
Mazyrski [523]
B\geq 5,000

because the library has more than or = to 5000 books.
7 0
3 years ago
The area of a rectangular painting is 5/8 square yard. The width is 3/4 yard. What is the length of the painting?
vfiekz [6]

Answer:

The answer is

<h2>\frac{5}{6}  \:  \:  \:  \: yards \\</h2>

Step-by-step explanation:

Area of a rectangle = length × width

Since we are finding the length of the rectangle

length =  \frac{area}{width}  \\

From the question

area = 5/8 square yards

width = 3/4 yard

So we have

length =  \frac{5}{8}  \div  \frac{3}{4}  \\  =  \frac{5}{8}  \times  \frac{4}{3}  \\  =  \frac{5}{2}  \times  \frac{1}{3}

We have the final answer as

\frac{5}{6}  \:  \:  \:  \: yards \\

Hope this helps you

3 0
3 years ago
Find the range if the domain is -1. y= 2x^2 + 5x - 17
aleksley [76]

Answer:

I think its 17

Explanation:

Sorry If Im wrong

5 0
3 years ago
What is the surface area of the prism?
Taya2010 [7]

*see attachment for diagram of the prism being referred

Answer:

52 m²

Step-by-step explanation:

==>Given:

Rectangular prism as shown in the attachment having the following dimensions=>

length (l) = 4m,

width (w) = 3m

height (h) = 2m

==>Required:

Surface area of the prism = 2 (wl + hl + hw)

==>Solution:

Surface area of the triangular prism = 2 (wl + hl + hw)

= 2*[(3*4) + (2*4) + (2*3)]

= 2*[12 + 8 + 6]

= 2*[26]

S.A = 52 m²

Surface area of the rectangular prism = 52 m²

7 0
3 years ago
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