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8090 [49]
3 years ago
15

5x^2-5x-30=0 solve using quadratic

Mathematics
1 answer:
dangina [55]3 years ago
4 0

Answer:

=3

=−2

Step-by-step explanation:

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The angle of depression from the hot-air
BlackZzzverrR [31]

Answer:

3497.47 feet

I think it's the answer because when you look where I've drawn...that's where the angle of depression is and 6600 is the hypotenuse, so you use the sine method where you have opposite over hypotenuse

\sin(32 = opposite \6600)

and you'll get your answer as 3497.47

3 0
2 years ago
Two rectangles are similar. One has a length of 11 cm and a width of 10 cm, and the other has a width of 7 cm. Find the length o
amm1812
7.7 cm Because the sides of similar figures are in direct proportion to each other
6 0
3 years ago
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A population of insects grows exponentially, as shown in the table. Suppose the increase in population continues at the same rat
Ivanshal [37]

We are told that a population of insects grows exponentially and we are given a table of data about insect population growth. We are asked to find population of insects at the end of week 11.        

The initial insect population is 20 and at the end of 1st week population increases to 30.

Let us find growth percentage of insect  population,

\text{Growth percentage}=\frac{\text{Difference}}{Actual} \cdot100

\text{Growth percentage}=\frac{\text{30-20}}{20} \cdot100

\text{Growth percentage}=\frac{\text{10}}{20} \cdot100

\text{Growth percentage}=0.5 \cdot100=50

We can see that insect population is growing at rate of 50% per week.

Now let us write an exponential function for our population.

P(w)=20(1+0.50)^{w}, where P(w) represents population at the end of w weeks.

Let us substitute w=11 in our function to find insect population at the end of 11 weeks.

P(11)=20(1+0.50)^{11}

P(11)=20(1.50)^{11}

P(11)=20\cdot 86.49755859375

P(11)=1729.951171875\approx 1730

Therefore, population of insects at the end of 11th week will be 1730.  



7 0
4 years ago
How to read a inch ruler
xxTIMURxx [149]

Answer: I am not sure how to answer this question besides the fact a inch ruler will have 12 inches. 12 inches equal 1 foot. Each foot is broken down into inches. Hope this helps :)

Step-by-step explanation:

5 0
3 years ago
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How do you do question 22
Alborosie

Answer:

  ∠YXZ = 58°

Step-by-step explanation:

Use the angle sum theorem and the given relations.

  ∠WXY +∠WXV = ∠YXV

  ∠WXY +(11° +3∠WXY) = 139°

  4∠WXY = 128° . . . . . subtract 11°

  ∠WXY = 32° . . . . . . . divide by 4

Similarly, ...

  ∠WXY +∠YXZ = 90°

  ∠YXZ = 90° -∠WXY = 90° -32°

  ∠YXZ = 58°

6 0
3 years ago
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