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soldier1979 [14.2K]
2 years ago
14

2

Mathematics
1 answer:
mylen [45]2 years ago
8 0

Answer:

4a

Step-by-step explanation:

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Can you guys solve this please step by step thank you so much x + 18 = 2x + 9
Bezzdna [24]

Answer:

x=9

Step-by-step explanation:

x+18=2x+9

-x       -x

18=x+9

-9     -9

9=x

x=9

8 0
3 years ago
Read 2 more answers
How can you check to see if two ratios form a proportion? Explain the method you used to find the answer to the previous problem
antiseptic1488 [7]

Answer:

In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. To find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

Step-by-step explanation:

In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. To find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

6 0
3 years ago
Read 2 more answers
64/143 - 21/208 what does it equal to and how?
Arlecino [84]
2 11/78 you just have to simply multiply 64/143 x2 because since it can't be subtracted. And after you multiply 64/143, you just have to subtract normally which is 128-21 and 286-208. Then since your answer came out to an improper fraction, so you have to simplify by dividing 107 divided by 78. Then you will get your answer which is 2 11/78.

5 0
3 years ago
Missing angles in triangles
notsponge [240]

Answer:

Step-by-step explanation: the way to find missing anlges are to use trigrometery

4 0
3 years ago
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Please help
Zolol [24]

Given:

The function is

r(x)=0.05(x^2+1)(x-6)

where, function r gives the instantaneous growth rate of a fruit fly population x days after the start of an experiment.

To find:

Number of complex and real zeros.

Time intervals for which the population increased and population deceased.

Solution:

We have,

r(x)=0.05(x^2+1)(x-6)

r(x)=0.05(x^3+x-6x^2-6)

Here, degree of function x is 3. It means, the given function has 3 zeros.

From the given graph it is clear that, the graph of function r(x) intersect x-axis at once.

So, the given function r(x) has only one real root and other two real roots are complex.

Therefore, function r has 2 complex zeros and one real zero.

Before x=6, the graph of r(x) is below the x-axis and after that the graph of r(x) is above the x-axis.

Negative values of r(x) represents the decrease in population and positive value of r(x) represents the increase in population.

Therefore, based on instantaneous growth rate, the population decreased between 0 and 6 hours and the population increased after 6 hours.

3 0
3 years ago
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