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Rom4ik [11]
3 years ago
6

Please Help!!! the picture is below

Mathematics
1 answer:
wariber [46]3 years ago
7 0

Answer:

Step-by-step explanation:

√20 is the correct answer.  It's between 4 and 5, just as 20 is between 4^2 and 5^2 (or 16 and 25).

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The system of equations can be solved using linear combination to eliminate one of the variables. 2x − y = −4→10x − 5y = −20 3x
tester [92]

Answer:

Option D is correct.

13x = 39

Step-by-step explanation:

The system of equation is given:

2x-y = -4             ....[1]

3x+5y = 59         .....[2]

Multiply equation [1] by 5 to both sides we have;

10x-5y = -20              .....[3]

Using elimination method:

Add [2] and [3] equations to eliminate y and solve for x, we have;

13x = 39

Divide both sides by 13 we get;

x = 3

Substitute x in [1] we have;

2(3)-y = -4

6-y = -4

Subtract 6 from both sides we have;

-y = -10

Divide both sides by -1 we have;

y = 10

⇒Solution: (3, 10)

Therefore, an equation can replace 3x+5y = 59 in the original system and still produce the same solution is,

13x = 39

6 0
3 years ago
Read 2 more answers
A country's population in 1990 was 134 million. In 2000 it was 139 million. Estimate the population in 2014 using the exponentia
Rainbow [258]

Answer

P = 147 million

Step by step explanation

P = Po r^t -------------(1)

Po initial population, r = rate, t = number of years

Here P = 139, Po = 134, t = 10.

Now plug in these values into the formula and find the rate r.

139 = 134r^10

r^10 = 139/134

r = (139/134)^1/10

Now we got r, now plug in the equation (1)

Let's find the population in the year 2014, here t = 24

P = 134 (139/134)^(24/10)

P = 134(139/134)^(2.4)

P = 134*1.1

P = 147.4

P = 147 million

The country's population in 2014 is 147 million (estimation).

Thank you.

7 0
2 years ago
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tekilochka [14]
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Let y represent the frog population. Then
.. y = 1200*0.97^x
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3 years ago
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The sales tax in your city is %8.8, point, percent, and an item costs \$63$ before tax.
Flura [38]

Answer:

$68.54

Step-by-step explanation:

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3 years ago
Find the measure of each angle in the figure
Rus_ich [418]

Answer:

Step-by-step explanation:

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