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Masja [62]
3 years ago
9

Given f(x) = x^2 + 3 , work out the value of f(4)

Mathematics
2 answers:
Tamiku [17]3 years ago
7 0

Answer: 19

Step-by-step explanation:

f(4)=(4)^2+3=16+3=19

kondaur [170]3 years ago
5 0

Answer:

f(4) = 19

Step-by-step explanation:

f(x) = x^2 + 3

plug in 4 for the xs

f(4) = 4^2 + 3

f(4) = 16 + 3

f(4) = 19

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What is the factorization of the trinomial below?
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2 years ago
Read 2 more answers
Find the product of z1 and z2, where z1 = 7(cos 40° + i sin 40°) and z2 = 6(cos 145° + i sin 145°).
Oduvanchick [21]
For two complex numbers z_1=re^{i\theta}=r(\cos\theta+i\sin\theta) and z_2=se^{i\varphi}=s(\cos\varphi+i\sin\varphi), the product is

z_1z_2=rse^{i(\theta+\varphi)}=rs(\cos(\theta+\varphi)+i\sin(\theta+\varphi))

That is, you multiply the moduli and add the arguments. You have z_1=7e^{i40^\circ} and z_2=6e^{i145^\circ}, so the product is

z_1z_2=7\times6(\cos(40^\circ+145^\circ)+i\sin(40^\circ+145^\circ)=42(\cos185^\circ+i\sin185^\circ)=42e^{i185^\circ}
3 0
3 years ago
Read 2 more answers
A geologist has two rocks on a scale that weighs 2 1/2 pounds together rock A was 1/7 of the total weight. How much did rock A w
jarptica [38.1K]
5/14 is the answer. I'll do my best bud
Answer↑

Steps↓
Convert 2 1/2 to an improper fraction:
2 + 2+ 1 over 2

Once you add the numbers, that will be 5/2.

Now, multiply that with 1/7:
5/2 • 1/7

Your answer will be 5/14

Therefore, Rock A weighs 5/14 pounds
7 0
3 years ago
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