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patriot [66]
3 years ago
14

Are 4x and 15 + x equivalent expressions

Mathematics
1 answer:
I am Lyosha [343]3 years ago
6 0
Yes if x=5 then 4(5)= 20 and 15+5=20
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Factorize the following algebraic expression:
Hoochie [10]
X^2+16-38=0
find what 2 numbers multiply to get -38 and add to get 16
find factors of 38
2 times 19
there is no way to use common factor so use quadratic formula which is
x=\frac{ -b+\sqrt{b^2-4ac} }{2a} or x=\frac{ -b-\sqrt{b^2-4ac} }{2a}

ax^2+bx+c=0 subsitte
a=1
b=16
c=-38
subsitute
\frac{ -16+\sqrt{16^2-4(1)(-38)} }{2(1)}=\frac{ -16+\sqrt{256+152} }{2}= \frac{ -16+\sqrt{408} }{2}= \frac{ -16+2\sqrt{102} }{2}=-8+\sqrt{102}
so the answers for x are -8+\sqrt{102} and -8-\sqrt{102}  which are aprox -2.099504938362 and +18.099504938362
so it would be
(x-[-8+√102])(x+[8+√102])=0


6 0
2 years ago
Need help on 7-10 lol pls!!
Afina-wow [57]

Answer:

sorry i dont know :(

Step-by-step explanation:

sorry :(

3 0
2 years ago
I need help really fast
topjm [15]
The Answer is letter a
8 0
3 years ago
A car used 1/72 of a galloon of gas to drive 1/3 of a mile.At this rate,how many miles can the car travel using 1 galloon of gas
KiRa [710]

Answer:

24

Step-by-step explanation:

3 x 1/72 = 1 mile

72/3 = 24

The car will use 1 gallon of gas per 24 miles

7 0
1 year ago
A restaurant stacked 7 pieces of wood on top of one another if each piece was 4/8 of a foot tall how tall was his pile
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His pile was 3 1/2 ft
Hope this helps!
7 0
3 years ago
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