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cluponka [151]
3 years ago
13

Plz answer ill give brainliest i only need 3 if you answer all your a living legend

Mathematics
1 answer:
Marat540 [252]3 years ago
6 0

Answer:

it is ∠5

Step-by-step explanation:

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Write one word problem involving simultaneous linear equations.
amm1812

Answer:

Andre has more money than Bob.  If Andre gave Bob $20, they would have the same amount.  While if Bob gave Andre $22, Andre would then have twice as much as Bob.  How much does each one actually have?

Step-by-step explanation:

Here is the first sentence:

"If Andre gave Bob $20, they would have the same amount."

Algebraically:

1)   x − 20 = y + 20.

(Andre -- x -- has the same amount as Bob, after he gives him $20.)

Here is the second sentence:

"While if Bob gave Andre $22, Andre would then have twice as much

as Bob."

Algebraically:

2)   x + 22 = 2(y − 22).

(Andre has twice as much as Bob -- after Bob gives him $22.)

To solve any system of two equations, we must reduce it to one equation in one of the unknowns.  In this example, we can solve equation 1) for x --

x − 20 = y + 20

 implies   x = y + 40

-- and substitute it into equation 2):

y + 40 + 22 = 2(y − 22).

      That is,

y + 62 = 2y − 44,

y − 2y = − 44 − 62,

according to the techniques of Lesson 9,

−y = −106

y = 106.

Bob has $106.  Therefore, according to the exression for x, Andre has

106 + 40 = $146.

I hope this helps u! :D

7 0
3 years ago
What is the solution to the system of linear equations represented by the matrix below?
olga_2 [115]
\begin{bmatrix}2&4\\1&2\end{bmatrix}\begin{bmatrix}x\\y\end{bmatrix}=\begin{bmatrix}6\\3\end{bmatrix}

Notice that the second row is half the first, so the rows are dependent. This means there are infinitely many solutions to the system.
6 0
3 years ago
Read 2 more answers
If a 9
lyudmila [28]

Answer:

$2.63

Step-by-step explanation:

$23.67/9packets

$2.63/packet

3 0
3 years ago
10. Use the discriminant to find the values of b for which the equation 4x2 + bx + 1 = 0 has one real solution.
il63 [147K]

Answer:

b = 4, or -4

Step-by-step explanation:

b^2 - 4*4*1 = 0

b^2 = 16

b = 4, or -4

8 0
2 years ago
Next week the store is going to reduce the price from $42 to $31.50. Calculate what percent the sale price is of retail price.
Studentka2010 [4]

Answer:

13.23 is 31.50 percent of 42 and the price they dropped down was $10.5

Step-by-step explanation:

hope this helps pls mark me as brainliest! :)

8 0
3 years ago
Read 2 more answers
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