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3 years ago

What is a formula for the nth term of the given sequence? -3,-8, -13...

Mathematics

1 answer:

bagirrra123 [75]3 years ago

6 0

Answer:the answer is -43

Step-by-step explanation: it’s going down by five each time you have the first 3 already so subtract 5 6 more times

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(3a+2.5b)^2=9a^2+6.25b^2+*<br> Please help before Thursday

Anon25 [30]

Step-by-step explanation:

We have (x + y)² = (x + y)(x + y) = x² + 2xy + y².

Let x be 3a and y be 2.5b.

Therefore (3a + 2.5b)²

= (3a)² + 2(3a)(2.5b) + (2.5b)²

= 9a² + 15ab + 6.25b².

Hence the '*' sign should be replaced with 15ab.

5 0

3 years ago

Need help please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

lina2011 [118]

A) 6x + 4x -6 = 24 + 9x

10x - 6 = 24 + 9x

10x - 9x = 24 + 6

X=30

8 0

3 years ago

Find the coordinates of the midpoint of a segment with the endpoints (12,2) and (7,9)

olga55 [171]

Answer:

(9 $\frac{1}{2}$ , 5 $\frac{1}{2}$ ) or (9 1/2, 5 1/2) (same things, just typed two different ways)

Step-by-step explanation

I can't remember the midpoint formula so I'll use a different method to get the midpoint.

since the ratio of a midpoint is 1:1 and that as a fraction is 1/2, we can take these coordinates and designate which one is first and which one is second (12, 2) will be my second and (7,9) will be my first. The formula I will use will be $\frac{m}{m+n} (second X, - first X) + first x$ , so 1/2( 12 - 7) +7. now distribute the 1/2 to both the numbers $\frac{1x12}{2} -\frac{1x7}{2} + 7 \\ \\ 12/2 -7/2 = 5/2 + 7 = 9.5$ or $9\frac{1}{2}$ . The same works with the Y values, which would equal up to 5.5 or 5 $\frac{1}{2}$

5 0

1 year ago

Julie and Eric row their boat at a constant speed of 48 miles downstream for 6 hours, helped by the current. Rowing at the same

Alex

Solve for the two velocities:
with the current = 48/6 = 8 mph
against the current = 48/8 = 6 mph
bv= boat velocity in still water
cv = current velocity
A) bv -cv = 6mph
B) bv + cv = 8mph
Adding both equations
2 * bv = 14 mph
boat velocity = 7 mph
current velocity = 1 mph
Calculator and tutorial can be found here:
http://www.1728.org/veloccal.htm

6 0

3 years ago

A fly is standing on a boulder, which is rolling down a hill. The forward torque the fly exerts on the boulder when it has rolle

san4es73 [151]

Step-by-step explanation:

For a wave y = A sin(Bx + C) + D, the midline is y = D.

In this case, the midline is y = 0.

8 0

3 years ago