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Kisachek [45]
3 years ago
5

Find the value of this expression if x=-7. x^2 -1 /x+4

Mathematics
1 answer:
belka [17]3 years ago
6 0

Answer:

-16

Step-by-step explanation:

x^2 -1 /x+4

By putting the value of x in the expression as x = -7

= (-7)^2 - 1/ -7 +4

= (+49) - 1/ -3

= 48/-3

= -16

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Cindy plans to invest for 10 years at 1.5%, compounded annually. If she hopes to have $10,000 after 10 years, how much
iogann1982 [59]

Answer:

Use the formula for calculating compound interest PN=P0(1+rk)Nk where P0 is the unknown, PN=10,000, N=10, k=1, and r=0.015. Substitute the values into the formula and simplify.

10000=P(1+0.0151)1⋅10

10000=P(1.015)10

10000=P(1.16054...)

8616.67=P

Therefore, rounded to the nearest dollar, the initial investment needs to be $8617 to have $10,000 in 10 years.

Step-by-step explanation:

8 0
3 years ago
Water stations will be placed every 400 meters of a 5 - kilometer race. How many water stations are needed? (hint 1 kilo=1,000 m
Neko [114]
1 kilo=1000 meters. 
The race is 5,000 meters total.
5000 divided by 1 station every 400 miles.
5000/400=12.5
12.5 water stations!
<em />I dont know if you're supposed to round but there you go!
8 0
4 years ago
Miranda has 5/8 of a yard of ribbon. if she used 1/3 of it to make a hair bow, how much ribbon would she have left. PLEASE HELP
bezimeni [28]

Answer: 5/12

Step-by-step explanation:

Step 1

Whenever you have something OF  something, you just mulltiply.

1/3 of  5/8=  

1/3x5/8

5/24

She used 5/24, and started with 5/8

5/8-5/24= 5/12  left

8 0
2 years ago
Read 2 more answers
X=? <br><br> 38 degrees 75 degrees
Nadya [2.5K]
<h2>sum of angle of triangle is 180°</h2>

<h2>A+B+C = 180 </h2>

<h2>38°+75°+ X = 180°</h2>

<h2>113° + X = 180°</h2>

<h2>X = 180° -113</h2>

<h2>X = 67°</h2>

4 0
3 years ago
What’s 9n-3 simplified
Katarina [22]

Answer:

9n-3

Step-by-step explanation:

since 9n has a variable, u can't add or subtract 9n with 3

but if you were multiplying: 9n(3) then it would be 27n

:)

7 0
3 years ago
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