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Tatiana [17]
3 years ago
13

Resolver a equacao x² - 16 = 0 pf

Mathematics
2 answers:
Leni [432]3 years ago
6 0
4, because 4 to the power of two means you multiply that number by itself so 4x4=16. And 16-16=0 <span />
Novosadov [1.4K]3 years ago
5 0
The answer is 4 you're very welcome
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Can someone answer 8, 9, and 10 please?
schepotkina [342]
8)
<1 = 90
answer is a. 90

9)
k = 180 - 23 - 77
k = 80
answer is c.80
10)
x = 180 - 60 - 42
x = 78

z = 180 - 78
z = 102

y = 180 - 11 - 102
y = 67

answer is c x = 78 y = 67  z = 102

5 0
2 years ago
Please help:)I’m not good at math and need to get this done ASAP
german

Answer:

<em>25</em><em> </em>

Step-by-step explanation:

let's solve,

=》

5 {}^{ \frac{ - 5}{2} }  \times 5 { \frac{9}{2} }^{}

=》

{5}^{ \frac{ - 5}{2} +  \frac{9}{2}  }

=》

5 {}^{ \frac{4}{2} }

=》

5 {}^{2}

=》

25

<em>glad</em><em> </em><em>to</em><em> </em><em>help</em><em> </em><em>you</em><em>.</em><em>.</em><em>.</em><em>.</em><em>.</em>

8 0
3 years ago
Used DVDs are on sale for a price of 5 for $20. At that price, how much will is cost to buy 12 used DVDs?
Levart [38]
If you reduce the 5 for 20, you will get 1 for $4. Therefore, 12×4 will be the answer ($48)
6 0
3 years ago
Read 2 more answers
Look I have like barely any points can someone help answer this tho
MariettaO [177]

Answer:

3.5

Step-by-step explanation:

These are similar triangles.

BC:AC = BD:AD

6:5  is the ratio.

Then, simply multiply:

4.2 x 5/6 = 3.5

So, x = 3.5!

5 0
3 years ago
An object is launched from a launching pad 208 ft. above the ground at a velocity of 192ft/sec. what is the maximum height reach
Alexeev081 [22]

Answer:

h(x) = -16x² + 192x + 208

784ft

6 sec

13 sec

Step-by-step explanation:

a)

h(x) = -16x² +vx + h_{o}

here v represent velocity

         h_{o} represent initial height of launch

       

h(x) = -16x² + 192x + 208

b)

h(x) = -16x² + 192x + 208

here a = -16

        b = 192

        c = 208

x = -b/2a

  = -192/2(-16)

  = 6

plug this value in the equation

h(x) = -16(6)² + 192(6) + 208

      = 784ft

e)

Plug h(x)=0 in the equation

0 = -16x² + 192x + 208

divide equation by -16

x² - 12x - 13 = 0

Factors

1x * -13x = -13

1x - 13x = -12

Factorised form

x² - 12x - 13 = 0

x² + x - 13x - 13 = 0

x(x+1) -13(x+1) = 0

(x+1)(x-13) = 0

x = -1

x = 13

Since time can not be negative so we will reject x = -1  

3 0
3 years ago
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