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telo118 [61]
2 years ago
5

Need help with this question

Mathematics
1 answer:
Helen [10]2 years ago
5 0

Answer:

4x+18

Step-by-step explanation:

Length = x+3+x+3

width = x+3-x= 3

perimeter = x+3+x+3+x+3+x+3+3+3=4x+18

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a man invested a total of $3,000 in two investments. he made a profit of 3% on the first investment and 4% on the second investm
klio [65]
Let the first investment be x
and second be 3000-x

so 3%of x + 4% of (3000-x) = 107
By solving x = 1300 

First investment is 1300
second investment is 1700
7 0
4 years ago
Solve the following equation for x. 7x^2-112=0
xxMikexx [17]

Answer:

x = 4 or x = -4

Step-by-step explanation:

3 0
3 years ago
If x+1 and x-1 are the factors of the polynomial ax^3 + x^2 - 2x +b,find the values of a and b
Nadusha1986 [10]

The polynomial remainder theorem says that dividing a polynomial p(x) by x-c leaves a remainder of p(c)=0 if x-c is a factor of p(x). In this case, check c=-1 and c=1.

a(-1)^3+(-1)^2-2(-1)+b=-a+b+3=0

a(1)^3+(1)^2-2(1)+b=a+b-1=0

From the first equation,

-a+b+3=0\implies a=b+3

and substituting into the second gives

(b+3)+b-1=0\implies2b+2=0\implies b=-1\implies a=2

3 0
3 years ago
PLEASE HELP! is slope = undefined the same as y = 0?
olchik [2.2K]
An undefined slope is NOT the same as y= 0, since it is a vertical line. The x-coordinate never changes even if the y-coordinate is different. There is no run.
7 0
3 years ago
Fifteen 2 inch nails weigh 35 grams. How many of these nails weigh 175 grams? Can you explain how to do this please thankyou so
polet [3.4K]
Solving:

1) Pass: Make the rule three (Directly proportional) 

Two inch nails ______ grams (<span>Weight)
</span>15 ----------------------------35
n ----------------------------- 175

2) Pass: <span>Multiply cross
</span>
35*n = 15*175

3) Pass: Simplify
35*n = 15*175
35n = 2625
n =  \frac{2625}{35}
\boxed{n = 75}

Answer:
75 nails weigh 175 grams



8 0
3 years ago
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