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just olya [345]
2 years ago
13

Domain of (x-5)(x+5)

Mathematics
1 answer:
soldier1979 [14.2K]2 years ago
4 0
X2 -25 that’s the answer but it’s x squared 2 if that makes sense
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Yasir designs bracelets. He uses between 9 and 15 red and yellow beads in a ratio of 2 red beads to 5 yellow beads. Drag the bea
iris [78.8K]
For 2 red beads, Yasir uses 5 yellow beads,

2+5=7 is less that the total number of beads per bracelet.

so we multiply both (2 and 5) by 2, and get (4 and 10) red beads and yellow beads.

4+10=14, so the total number is between 9 and 15 as required.

Answer: 

4 red beads
10 yellow beads
5 0
3 years ago
Please help!! Write the sum using summation notation, assuming the suggested pattern continues. -9 - 4 + 1 + 6 + ... + 66
fiasKO [112]
r=-4-(-9)=-4+9=5 \\  \\ a_{1}=-9 \\  \\ a_{n}=66 \\  \\ a_{n}=a_{1}+(n-1)r \\  \\ -9+5(n-1)=66 \\  \\ -9+5n-5=66 \\  \\ 5n-14=66 \\  \\ 5n=80 \\  \\ n=16 \\  \\ S_{n}= \frac{a_{1}+a_{n}}{2} *n \\  \\ S_{n}= \frac{-9+66}{2}*16=57*8=456
4 0
2 years ago
PLEASE HELP! WILL GIVE BRAINLIEST! After substituting, what is the first step when evaluating 4y+9 when y=82 O Add 4 and 9. O Mu
Svetradugi [14.3K]

Answer:

The answer is c

Step-by-step explanation:

3 0
2 years ago
for his long distance phone service, lamar pays a $3 monthly fee plus 11 cents per minute. last month, lamar's long distance bil
e-lub [12.9K]
Let the number of minutes be = x.

Cost per minute = 11 cents = 0.11

Phone Bill = Monthly fee  +    0.11* x 

Substituting from the question

20.82 = 3 + 0.11x

3 + 0.11x = 20.82

0.11x = 20.82 - 3

0.11x = 17.82

x = 17.82/0.11

x = 162  

<span>Lamar was billed for 162 minutes.</span>
4 0
3 years ago
A right cubic prism has edges of 2 1/2 inches. How
3241004551 [841]

Answer:

Option D, the volume is 15.625 cubes

Step-by-step explanation:

For a cube of side length L, the volume is:

V = L^3

for the smaller cubes, we know that each one has a side length of 1 in, then the volume of each small cube is:

v = (1in)^3 = 1 in^3

Then:

1 in^3 is equivalent to one small cube

Here we know that the side length of our cube is (2 + 1/2) in

Then the volume of this cube will be:

V = [ (2 + 1/2) in]^3

To simplify the calculation, we can write:

2 + 1/2 = 4/2 + 1/2 = 5/2

Then:

V = ( 5/2 in)^3 = (5^3)/(2^3) in^3 = 125/8 in^3 = 15.626 in^3

This means that 15.625 small cubes will fill the prism.

So the correct option is D.  

8 0
2 years ago
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