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astra-53 [7]
4 years ago
13

Which ordered pair is the best estimate for the solution of the system of equations?

Mathematics
2 answers:
alexandr1967 [171]4 years ago
8 0
Estimate
(x,y)
x=left right
y=up down

solution=intersection
looks like about 6.5 left or x=-6.5 and y=3.5 down or y=-3.5

(-6.5,-3.5) would be a good estimate
(if you did calculate it it would be (-32/5,-18/5) or about (-6.4,-3.6))

answer is first option
Montano1993 [528]4 years ago
6 0

Answer:

the first answer

Step-by-step explanation:

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Will Mark brainlyest, offering max points: Which of the following quadratic functions does this graph represent?
prohojiy [21]

Answer:

The quadratic formuls that this graph represents is: <u><em>f (x) = -x 2 -2x +3</em></u>

Have a nice day!

7 0
2 years ago
You have $4.10 in nickels, dimes, and quarters. If you have twice as many dimes as quarters, and five more nickels than dimes, h
lutik1710 [3]

For this case, the first thing to do is define variables.

We have then:

  • <em>x: number of nickels </em>
  • <em>y: number of dimes </em>
  • <em>z: number of quarters </em>

We write now the system of equations:

0.05x + 0.1y + 0.25z = 4.10\\y = 2z\\x = y + 5

Then rewriting the equations we have:

0.05 (2z + 5) + 0.1 (2z) + 0.25z = 4.1\\0.05 (2z + 5) + 0.1 (2z) + 0.25z = 4.1\\0.1z + 0.25 + 0.2z + 0.25z = 4.1\\0.55z = 4.1-0.25

z = \frac {3.85} {0.55}\\z = 7

Then, substituting values we have:

y = 2 (7)\\y = 14

Finally:

x = 14 + 5\\x = 19

Answer:

19 nickels

14 dimes

7 quarters

6 0
4 years ago
What is -20.3-14.34?
djyliett [7]

Answer:

-34.64

Step-by-step explanation:

-20.3-14.34

-34.64

8 0
3 years ago
Id get this question can u help me ?
DedPeter [7]

The answer is this I’m sorry :)) I hope this helped

8 0
4 years ago
For what values of x does<br> 25^x = 5^(x2-3?)
lidiya [134]

Answer:

<em>x = 3 or x = -1</em>

Step-by-step explanation:

     25^x = 5^(x^2 - 3)

<=> (5^2)^x = 5^(x^2 - 3)

<=> 5^(2x) = 5^(x^2 - 3)

<=> 2x = x^2 - 3

<=> x^2 - 2x - 3 = 0

<=> x^2 + x - 3x - 3 = 0

<=> x(x + 1) - 3(x + 1) = 0

<=> (x - 3)(x + 1) = 0

<=> x = 3 or x = -1

I hope this helps!

8 0
3 years ago
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