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son4ous [18]
3 years ago
8

Find the value of x and y? A) x=15 y=12 B) x=14 y=11 C) x=14 y=12 D) x=15 y=11

Mathematics
1 answer:
Alina [70]3 years ago
6 0

im pretty sure the answer is c.

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Math questions!! 30 points
vampirchik [111]

Answer:

Excluded Value :  3 and  -5  

Step-by-step explanation:

hello :

Excluded Value :    and    

the excluded value when : x²+2x-15=0

( x²+2x+1)-1-15=0

means : (x+1)²-16=0       (x+1)²-4² = 0

by identity : a²-b² =(a-b)(a+b)

(x+1-4)(x+1+4) =0   so :      (x-3)(x+5) =0  means : x-3=0 or x+5=0

x=3 or x= -5

Excluded Value :  3 and -5

5 0
3 years ago
The greatest common factor of three numbers is 9. The sum of the numbers is 90. Find the three numbers.
Ivan

Answer:

2, 3, 5

Step-by-step explanation:

9 x 2= 18

9 x 3 = 27

9 x 5 = 45

4 0
3 years ago
What percentage of 5,000 is 5
-Dominant- [34]

Answer:

Step-by-step explanation:

.1

8 0
3 years ago
The length of a rectangle is 2 inches more than its width. The perimeter of the rectangle is 24 inches. The equation 2x + 2(x +
alexandr1967 [171]
2x + 2(x + 2) = 24
2x + 2x + 4 = 24
4x = 24 - 4
4x = 20
x = 20/4
x = 5

The value of x that holds true for the equation is : x = 5.
So the width of the rectangle is 5 inches and the length is (x + 2 = 5 + 2) = 7 inches
7 0
3 years ago
A cone has a lateral area of 108 in2 and a base area of 48 in2. What is the surface area of the cone? A. 60 in2 B. 140 in2 C. 12
Andrei [34K]
Based on the given data, the following formula will be useful;
Area of the base, A = pi*r^2
Lateral Area, A(l) = pi*r*sqrt of h^2 + r^2
Surface Area, A(s) = pi*r*(r+sqrt of h^2 + r^2)
Based on the given area of the base, the radius can be calculated and is equal to 3.9088 in. Based on the given lateral area, the h or the lateral edge can be calculated and is equal to 7.8785 in. Given all the information needed, and directly substituting to the above formula for surface area, SA is equal to 156 in^2 (option D)
5 0
3 years ago
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