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Katarina [22]
3 years ago
14

ONLY NUMBER 7. HELP PLEASEEEE. I START SCHOOL TOMORROW

Mathematics
2 answers:
lora16 [44]3 years ago
5 0

Answer:

(x^2) + 1 = y

Step-by-step explanation:

To check, you can just plug in the x values given. It should equal to its given y value.

natali 33 [55]3 years ago
3 0

Answer:

y = x² + 1

Step-by-step explanation:

Consider the differences in the y values

y : 1  2  5   10  17

      1   3   5   7 ← first differences are not constant so not linear

Consider the differences of the first differences

1   3   5   7

  2  2   2← second differences are constant

Because the second differences are constant the relationship is quadratic

The form of the relationship is

y = x² ± c ← where c is a constant

Substitute values of x into the relationship to find what is needed

x = 0 : y = 0² = 0 ← require to add 1 to obtain 1

x = 1 : y = 1² = 1 ← require to add 1 to obtain 2

x = 2 : y = 2² = 4 ← require to add 1 to obtain 5

x = 3 : y = 3² = 9 ← require to add 1 to obtain 10

x = 4 : y = 4² = 16 ← require to add 1 to obtain 17

Hence relationship is y = x² + 1

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In a right triangle abc, cd is an altitude, such that ad=bc. Find ac, if ab=3 cm, and cd= square root 2 cm.
Mashcka [7]

      <u>ΔACB</u>                                               <u>ΔCDA</u>

AC² + BC² = AB²                           AD² + CD² = AC²  

          BC² = AB² - AC²                 BC² + CD² = AC²        (AD=BC is given)

                                                                 BC² = AC² - CD²

                         AB² - AC² = AC² - CD²         (both sides were = to BC²)

                         AB² + CD² = 2AC²

                         (3)² + (√2)² = 2AC²            (AB=3 and CD=√2 were given)

                          9  +   2    = 2AC²

                               11        = 2AC²

                                \frac{11}{2}        = AC²

                                \sqrt{\frac{11}{2} }     = AC

                                \frac{11\sqrt{2} }{2}      = AC

7 0
3 years ago
Simplify (8 + 7i) + (2 –i)
inna [77]
<span>Simplify (8 + 7i) + (2 –i) 
</span>answer:10+6i 
8 0
3 years ago
If you start with 2 and count by 3s until you reach 449, you will get the sequence: 2, 5, 8, 11, …, 449. If 449 is the Nth numbe
max2010maxim [7]

Answer:

150

Step-by-step explanation:

The terms in the sequence form an arithmetic sequence with n th term

a_{n} = a₁ + (n - 1)d

where a₁ is the first term and d the common difference

Here a₁ = 2 and d = 3 , thus

2 + 3(n - 1) = 449

2 + 3n - 3 = 449

3n - 1 = 449 ( add 1 to both sides )

3n = 450 ( divide both sides by 3 )

n = 150

7 0
3 years ago
Put these in order of size smallest first 0.3 25% 2/5
meriva
25%, 0.3, 2/5

25% = .25
2/5 = .4
4 0
3 years ago
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Help will give brainliest
dsp73

Answer:

48/80*100 = 60 miles per hrs

Step-by-step explanation:

5 0
3 years ago
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