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Vikentia [17]
4 years ago
8

Solve x4 − 7x2 − 18 = 0

Mathematics
2 answers:
babunello [35]4 years ago
5 0
Thw answer is X = 3 or -3
Andrew [12]4 years ago
3 0

Answer:

the answer is ​

x=±3,±√​2

​

​​ ı

Step-by-step explanation:

(x​^2−9)(x​2+2)=0

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What is the product of 100 and 75
Genrish500 [490]

Answer:

In this question you have to find out the product. Product means simply multiplication. So multiplying 75×100 gives <u>7500</u> which is the correct answer.

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6 0
3 years ago
Read 2 more answers
In ΔUVW, the measure of ∠W=90°, the measure of ∠U=40°, and WU = 1.8 feet. Find the length of UV to the nearest tenth of a foot.
Dmitry_Shevchenko [17]

Answer: 2.3

Step-by-step explanation:

​

=

x

1.8

​

\cos 40=\frac{1.8}{x}

cos40=

x

1.8

​

x\cos 40=1.8

xcos40=1.8

Cross multiply.

\frac{x\cos 40}{\cos 40}=\frac{1.8}{\cos 40}

cos40

xcos40

​

=

cos40

1.8

​

Divide each side by cos 40.

x=\frac{1.8}{\cos 40}=2.3497\approx 2.3\text{ feet}

x=

cos40

1.8

​

=2.3497≈2.3 feet

5 0
3 years ago
Read 2 more answers
-7,-3,1,5,9
Serggg [28]

-7 + 4(n-1).  Use this and plug in 10 for n, making it

-7 + 4(9)

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29

5 0
2 years ago
What are the first four terms of the sequence modeled by the recursive formula a n =a n-1 +5, when a1 = -3?
Brut [27]

Answer:2,7,12,19

Step-by-step explanation:

a2=a2-1+5=-3+5=2

a3=a3-1+5=a2+5=2+5=7

a4=a3+5=12 and continue so on

3 0
3 years ago
Read 2 more answers
SOLVE ASAP! PLS HELP ME!!!
trapecia [35]

9514 1404 393

Answer:

  A.  2.1

Step-by-step explanation:

Put the numbers in the equation and do the arithmetic.

  1/R = 1/(3 1/2) +1/(5 1/4)

  1/R = 1/(7/2) +1/(21/4) = 2/7 +4/21 = (6 +4)/21

  R = 1/(10/21) = 21/10

  R = 2.1

7 0
3 years ago
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