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ZanzabumX [31]
3 years ago
6

By what percent will the product of two numbers decrease if one of them is decreased by 25% and the other one is decreased by 50

%?
Mathematics
1 answer:
olchik [2.2K]3 years ago
5 0
Well, let's say the numbers are "a" and "b"

so a * b = ab

ok... now, if we reduce "a" by 25%, that means the new size is just 75% of the old one, how much is 75% of a? well, (75/100) * a, or 0.75a

now let's reduce "b" by 50%, that means the new size is 50% or half,  how much is 50% of b? well (50/100)*b, or 0.5b

\bf \begin{cases}
a\cdot b\implies  ab\\
0.75a\cdot 0.5b\\
\qquad 0.75\cdot 0.5ab\\
\qquad 0.375ab
\end{cases}

now, the new size of "ab" is just 0.375ab... well, let's revert the decimal format by simply multiplying by 100

0.375 * 100, is 37.5%

the new size of "ab" is just 37.5% of the original "ab"

it decreased by 100 - 37.5 or 62.5%
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Lewis fills his thermos with 2 liter of water. Garret fill his thermos with 1 of water. How many more milliliter of water does l
cluponka [151]

For this case we have to:

Lewis carries 2 liters of water

Garret carries 1 liter of water

So, Lewis has 1 liter of water more than Garret.

By definition we have that 1 liter equals 1000 milliliters.

Thus, Lewis carries 1000 milliliters more water than Garret.

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3 years ago
BRAINLIST AND A THANK YOU AND 5 stars WILL BE REWARDED PLS ANSER
vichka [17]

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The first picture's answer would be (6, 21)

Step-by-step explanation:

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3 0
3 years ago
A museumcharges forgeneraladmission and exhibitions. Admission and 3 exhibitionscosts $45. Admission and 5 exhibitionscosts $65.
frez [133]

Answer:

a

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7 0
2 years ago
Read 2 more answers
4. What is the solution to the system of equations?
Afina-wow [57]

Answer:

Step-by-step explanation:

2x + z = 9.....z = -2x + 9

so we r gonna sub in -2x + 9 for z in our other 2 equations

3x + 2y + z = 9                                     -3x - y + 3z = -7

3x + 2y + (-2x + 9) = 9                         -3x - y + 3(-2x + 9) = -7

3x + 2y - 2x + 9 = 9                             -3x - y - 6x + 27 = -7

x + 2y = 9 - 9                                        - 9x - y = -7 - 27

x + 2y = 0                                              -9x - y = - 34

now we take our results and eliminate a variable

x + 2y = 0

-9x - y = -34.....multiply by 2

-------------------

x + 2y = 0

-18x - 2y = - 68 (result of multiplying by 2)

------------------add

-17x = -68

x = -68/-17

x = 4

now we sub 4 in for x in either of our resulting equations

x + 2y = 0

4 + 2y = 0

2y = 0 - 4

2y = -4

y = -4/2

y = -2

now that we know x and y, sub these values in to any of the original equations to find z

z = -2x + 9

z = -2(4) + 9

z = -8 + 9

z = 1

check it...

3x + 2y + z = 9

3(4) + 2(-2) + 1 = 9

12 - 4 + 1 = 9

8 + 1 = 9

9 = 9 (correct)...and it checks out

solution is : (4,-2,1) <====

5 0
3 years ago
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