Without adding find the sum 1 +3+5+7+.........................+47+49

Answers

Answer 1

Answer:

Answer:

Hi,

Step-by-step explanation:

Find the sum 1 +3+5+7+.........................+47+49.

$Number\ of\ terms\ in\ this\ sum\ =(49-1)/(3-1)+1 =(48)/(2)+1=24+1=25 \n\n\n1+49=50\n\n1+2+3+4+...+49=(25*50)/(2) =25^2=\boxed{625}\n$

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A man travels for 6 hours at a rate of 50 miles per hour. His return trip takes him 7 1/2 hours. What is his average speed for the whole trip?

Answers

Multiply 6 hours times the rate of 50 miles per hour to get the total miles he traveled there. Which it was 300 miles to get there. It must have taken 300 miles to get back also. So divide distance (300) by time (7.5) to get 40 mph was the speed coming back. Now find the average of the two speeds ( 50+40=90 divded by 2) THE ANSWER IS 45 MPH FOR THE AVERAGE SPEED! (:

F(x)=-x+4 and g(x)=-2x-3 solve for f(g(x)) x=2

Answers

input
f(g(x))=-(g(x))+4=
g(x)=-2x-3
so
if x=2
f(g(2))=-(g(2))+4
g(2)=-2(2)-3=-4-3=-7

f(g(2))=-(-7)+4=7+4=11

f(g(2))=11

2. Given XYZ, if XY =YZ, and Y = 22,
find Z.

Answers

Answer:

Step-by-step explanation:

Sum of Triangle angles is 180

180 - 22 = 158

If the sides are the equal, the base angles are equal.

So, divide 158 by 2

The sum of twice a number and 10 is 36

Answers

2x+10=36
X=13
Subtract 10 from both sides then divide x

Final answer:

To solve the equation, subtract 10 from both sides and divide by 2 to find the value of x.

Explanation:

To solve this problem, we need to set up an equation using the given information. Let's assume the number is x. We can translate the phrase 'twice a number' into the expression 2x. The equation becomes:

2x + 10 = 36

Next, we can solve for x by subtracting 10 from both sides:

2x = 26

Finally, we divide both sides by 2 to isolate x:

x = 13

Learn more about Equations here:

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-7(1+7n)=36-6n this is a very hard solving equations question I don't get HELP!!!

Answers

n=-1 distribute then isolate your variable and divide

-7(1 + 7n) = 36 - 6n
-7(1) - 7(7n) = 36 - 6n
-7 - 49n = 36 - 6n
   +49n    +49n
   -7 = 36 + 43n
   -36   -36
      -43 = 43n
   43    43
      -1 = n

NEED HELP ASAP.A linear function has a y-intercept of -12 and a slope of 3. What is the equation of the line?

Answers

Answer:

y = 3x - 12

Step-by-step explanation:

Hope This Helps!

Plz Mark Brainliest!

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