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4 years ago

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: f (x) = -x 2 -2x +3

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:

x: number of nickels
y: number of dimes
z: number of quarters

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 25^x = 5^(x2-3?)

lidiya [134]

Answer:

x = 3 or x = -1

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