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Aneli [31]
2 years ago
13

Evaluate x² + 4x + 1 when x = -3

Mathematics
2 answers:
timurjin [86]2 years ago
8 0

Answer: -2

Step-by-step explanation:

We can combine the fundamentals of mental math and the brain to calculate the problem when x is -2. You wake up noticing x is -2 and you instantly know the answer and solved in less than a second.

Masteriza [31]2 years ago
3 0
Substitute -3 to x

(-3)^2 + 4(-3) + 1

9 - 12 + 1

= -2
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4. Determine all unknown sides and angles to 1 decimal place.
Ksju [112]

Answer:

The unknown sides are 60.81cm and 51.57cm while the unknown angle is 58degrees

Step-by-step explanation:

4a) Given the following

Opposite side = 38cm (side facing the given angle)

Required

Adjacent and hypotenuse side

According to SOH CAH TOA

tan \theta = \frac{opp}{hyp}\\tan 32=\frac{38}{hyp}\\hyp=\frac{38}{tan 32}\\hyp=\frac{38}{0.6249}\\hyp=  60.81cm

Next is to get the adjacent

Cos 32=\frac{adj}{60.81}\\adj=60.81cos32\\adj=60.81(0.8480)\\adj= 51.57cm

Next is to get the missing

Since sum of angle in the triangle is 180degrees

32 + 90 + x = 180

122 + x = 180

x = 180 - 122

x = 58degrees

7 0
3 years ago
On a four day trip you have traveled 429.8 miles at the end of one day if you plan to drive this amount in each of the remaining
Luden [163]
429.8x 4 days=1,719.2miles driven on a four day trip.
8 0
3 years ago
Read 2 more answers
I need help with this question. can someone please help me
Ahat [919]
-2x + y =3
use 5 number and put it in above equation to find y, I will use -2,-1,0,1,2
x      y
-2   -1
-1    1
 0    3
 1    5
 2    7

Then draw the graph, find another point in the graph which intersect the slope, 
lets say i found (-3,-3)which is on the slope
to prove it, i put (-3,-3) in the equation -2x + y = 3
and i got 
3 = 3
Thus it is correct.

7 0
3 years ago
Please help! An archway will be constructed over a walkway. A piece of wood will need to be curved to match a parabola. Explain
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6 0
3 years ago
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One of your aid workers stole doxycycline hyclate tablets. you determine that 7/10ths of the latest shipment of 17,250 tablets w
Serggg [28]
Is 7/10 was taken then there 3/10 left so .3*17250=5175 tablets left
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