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Sunny_sXe [5.5K]
3 years ago
12

THESE are PSAT questions please help.​

Mathematics
1 answer:
cricket20 [7]3 years ago
3 0

Answer:

Ok so number 7 is x>4

Number 6 is b

Number 5 is correct

Idk the other one

❤️❤️❤️Hope This Helps❤️❤️❤️

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PLEASE HELP ASAP!!!!! WILL GIVE BRAINLEST TO CORRECT ANSWER
marysya [2.9K]
It is B 80. Because it is 40 x 2 = 80. Hope thishelped
5 0
3 years ago
Read 2 more answers
Write the complex number 1 +i/1 -i into polar form​
IRINA_888 [86]

Answer:

cos(pi/2) + i sin (pi/2)

Step-by-step explanation:

(1+i)/ (1-i)

Multiply top and bottom by (1+i)

(1+i) (1+i)/ (1-i)(1+i)

Foil the top (1+i)(1+i) = 1 +2i +i^2 = 1 +2i -1 = 2i

Foil the bottom ( 1+i)(1-i) = 1 - i^2 = 1 - (-1) =2

2i/2 = i

the magnitude is (0^2+1^2) = 1

The angle is tan^-1( 1/0) = pi/2

cos(pi/2) + i sin (pi/2)

7 0
3 years ago
Barry's savings account has a balance of $2874. After 9 years, what will the amount of interest be at 5% compounded annually?
tatyana61 [14]
What you need to do is take $2874 and divide the 5% and then times the 9 by what you get 

4 0
3 years ago
Read 2 more answers
Separate non-x terms from x terms
wel

Answer:X^2-7X=57/4

Step-by-step explanation:

Y=X^2-7X+57/4

X^2-7X=57/4

6 0
3 years ago
Is the equation below a function? explain<br>d) y2 = x2 + 5​
RoseWind [281]

Answer:

No

Step-by-step explanation:

y^2 = x^2 + 5​

Rewriting

y^2 - x^2 = 5

This is a hyperbola

We can use the vertical line test to show that it is not a function since a vertical line passes through more than one point.

5 0
3 years ago
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