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it says thats not right :(

The answer is only (D).  Hope this helps!

Mean is the average

b / 5 = 9.8      b = 49 years total

g/15 = 10.2    g = 153 years total

(49+153) / 20 = 10.1 mean

8(2x - 4) = -4(-4x + 8)     expand

16x-32   = 16x - 32         

this shows x can be ANY value

2 L + 2W = 24     L = 1/3 W

2 (1/3 W) + 2W = 24

W = 9 cm    Then  L = 3 cm

Area = L * W = 27 cm²

6^(3t - 1) = 36^t.

6^(3t-1) = 6^2t

equate the exponents    3t-1 = 2t

                solve fot 't'

Actually......these are  " V " shaped graphs......one is inverted      They do not intersect at all .

Since this is a Linear graph, and the slopes are different, and the lines extend forever on both ends, then they will intersect, but only on one point.

The answer is 1.

Alright.

Let's start

So we know a rectangle has 2 long sides and 2 squishy short sides(width and length)

So we start with one "set" of width and length, which is 

the perimiter divided by 2

24/2 = 12

now the length is 3* the width

so 3 lengths and 1 width in the set, with each "set" having 4 "units"

so 12/4 = 3

3*3 units = 9 for longside, and 3 for short side

3*9 = 27 units of area

Answered.

Let x be the total number of guppies

5/16 of x go in the first tank

8/16 of x go in the second tank

so 3/16 of x go in the third tank

the difference between tank 2 and 3 is   (5/16)x

\(\frac{5}{16}*x=100\)

You can finish it.

30 / 5 ==6 km/h - speed of the paddler with the current

30 / 6.25 ==4.8 km/h - speed of the paddler against the current.

[6  +  4.8] / 2 ==5.4 km/h - speed of the paddler in still water.

[6  -  4.8] / 2==0.6 km/h - the speed of the current.

-199           all of the negatives from -98 to -1 cancel out the positives from 1 to 98     and you only have   -100 + -99 = -199  

Correct !   

Pythagorean theorem for right triangle

d^2 = 1^2 + 4^2       solve for d

 j = 154 

s = 26
 

pls respond

Initially :    1/4 (j-10) = s+10     or   s = 1/4j  -12.5

Then    1/2 ( j-34) = s+34          sub in the RED equation above for 's'   then solve for j

three digits?

I was going to say 3

The inverse function is f(x) = 15x - 8.

Wait why \(52 \cdot 51 \cdot 2?\)

The probability is 5/18.

The ratio of the measures of the sides of a triangle is 2:7:6. if the perimeter of the triangle is 345 yards, find the measure of the median side.     

Add up the ratio values                              2 + 7 + 6 = 15  

Divide that into the perimeter                     345 / 15 = 23  

Multiply that times each ratio value  

23 • 2 = 46      23 • 7 = 161      23 • 6 = 138  

I don't know what is meant by the "median side" of the triangle.  

See above the length of the three sides.  Pick the one you want.  

_.

it is 11/15