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4 years ago

Twenty more than half a number of 70.what is the number

Mathematics

2 answers:

Shkiper50 [21]4 years ago

6 0

The answer is 55 hope this helps

Dima020 [189]4 years ago

3 0

70 divided by half equals 35 (70/2= 35)
35+20= 55
Hope this helps!

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The the length of a rectangle is 9 centimeters less than four timesfour times its width. its area is 28 square centimeters. find

wel

Let w = width

then

5w-3 = length

w(5w-3) = 14

5w^2-3w = 14

5w^2-3w-14=0

(5w+7)(w-2) = 0

w = {-7/5, 2}

throw out the negative solution leaving

w = 2 centimeters

length:

5w-3 =5(2)-3 =10-3 = 7 centimeters

4 0

4 years ago

Work out, giving your answer in its simplest form:<br> 4/7 divided by 2 1/3

kirill [66]

Answer:

12/49

Step-by-step explanation:

First write 2 1/3 as a improper fraction, to do that, first multiply the 2 by the denominator, then add it with the 1, which will result in 7/3

when doing division of fraction you have to remember this, KFG

KFG: Keep Flip Change

you keep the first number or fraction, which is 4/7

then you flip the sign, so you change division in to multiplication

after that, you change or write the reciprocal of the second number or fraction, so 7/3 will be 3/7

Now the equation is

4/7 times 3/7, which is 12/49

4 0

3 years ago

A. Find y in terms of x if ????y????x=x6y−7 and y(0)=4. y(x)= (8/7x^7+4^8)^(1/8) . B. For what x-interval is the solution define

topjm [15]

Answer:

Step-by-step explanation:

part A)

given

$x=x6y-7$

so y in terms of x would be

$y=(x+7)/x6$

part b)

in order to find intervals of function, we determine the intervals where the function has a positive first derivative . To find intervals, first we find the critical values, or points at which the first derivative of the function is equal to zero. For the given function the intervals would be

put zero in equation

$y=(x+7)/6x$