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2 years ago

Evaluate w + 2w + 1

Mathematics

1 answer:

strojnjashka [21]2 years ago

5 0

Answer:

3w+1

Step-by-step explanation:

Add together like terms (the w's).

(hope this helps :P)

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Solve for x 1.6 equals 12.8

xenn [34]

Answer: x=14.4

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

Please help me on my homework. (Due tomorrow, March 21, 2017) you will get 22 points if you answer.

Oliga [24]

2. Look at which density value has the most samples, or which value has the most x's.

3. Look at the greatest density recorded and the lowest density recorded. What is the difference between these two densities? For example, if 1 and 3 were the lowest and greatest densities the answer would be 2.

6 0

2 years ago

Twin brothers, Billy and Bobby, can mow their grandparent’s lawn together in 63 minutes. Billy could mow the lawn by himself in

Pepsi [2]

Answer:

<h2>140 minutes</h2>

Step-by-step explanation:

this problem focuses on the combined work rate

both can finish the work under 63 minute

let bobby mow the lawn in x minute

Billy will then mow the lawn in x-25 minutes

Let the completed job = 1 (a mowed lawn)

we can now apply the combined work formula for the two boys as

$\frac{63}{x}+\frac{63}{x-25}=1$

multiplying through by x(x-25 )we have

$63(x-25)+63x= x(x-25)$

open bracket we have

$63x-1575+63x= x^2-25x$

rearranging and collecting like terms we have

$0=x^2-25x-63x-63x+1575 \\\\0=x^2-151x+1575 \\\\x^2-151x+1575=0$

we can now use the quadractic formula

$x=\frac{-b\frac{+}{} \sqrt{b^2-4ac} }{2a}$

a= 1

b= -151

c= 1575

$x=\frac{-(-151)\frac{+}{} \sqrt{151^2-4*1*1575} }{2*1}$

$x=\frac{-(-151)\frac{+}{} \sqrt{22801-6300} }{2} \\\\x=\frac{-(-151)\frac{+}{} \sqrt{16501} }{2} \\\\x=\frac{-(-151)\frac{+}{} 128.45}{2} \\\\$

$x=\frac{-(-151)+128.45}{2} \\\\\x=\frac{279.45}{2} \\\\x=139.72 \\\\\\x=\frac{-(-151)-128.45}{2}\\\\x=\frac{151-128.45}{2}\\\\x=\frac{22.55}{2}\\\\x=11.27$