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Andru [333]
4 years ago
13

PLZZZ HELPPPPP

Mathematics
1 answer:
olga nikolaevna [1]4 years ago
8 0

Step-by-step explanation:

let 3 sides be a b c

a-b<c<a+b (always)

we have 7+5 =12 (contradict the above property)

-> 12,7,5 will not make a triangle

You might be interested in
What number would you add to the equation below to complete the square?
Debora [2.8K]

Answer:

A. 25/4

Step-by-step explanation:

(5/2)^{2} = 25/4

3 0
3 years ago
Subtract 8 from 5 times a number. The result is 4 less than 3 times the number.
vovikov84 [41]

Answer: x =2

Step-by-step explanation:

5x - 8 = 3x - 4

2x = 4

x = 2

checking the work:

5(2) - 8 = 3(2) - 4

10 - 8 = 6 - 4

2 = 2

4 0
3 years ago
3/4x8/9 as simpiest form
anyanavicka [17]

Answer:

2/3

Step-by-step explanation:

3/4 x 8/9 = 24/36 or 2/3 simplified

3 0
3 years ago
You need a 75% alcohol solution. On hand, you have a 1125 mL of a 90% alcohol mixture. How much pure water will you need to add
Alex777 [14]
\bf \begin{array}{lccclll}&#10;&amount&concentration&&#10;\begin{array}{llll}&#10;concentrated\\&#10;amount&#10;\end{array}\\&#10;&-----&-------&-------\\&#10;\textit{90\% sol'n}&1125&0.9&(1125)0.9\\&#10;\textit{water}&x&0&0x\\&#10;-----&-----&-------&-------\\&#10;mixture&y&0.75&0.75y&#10;\end{array}

so.. whatever "x" is, we know 1125 + x = y
and whatever the alcohol concentration yield may be, we know

(1125)(0.9) = 0.75y

(1125)(0.9) = 0.75y   <--- solve for "y", that's how much the final amount of milliliters will be

how much pure water was added? subtract 1125 from that, or y - 1125


5 0
3 years ago
How do you solve 0,75 + -17
EastWind [94]

Answer:

-16.25

Step-by-step explanation:

take the bigger number (-17) change it to positive, and then subtract that by the other number(0.75) then once you get your result. return the negative for -16.25

If you liked this answer, give me brainliest please.

4 0
3 years ago
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