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timurjin [86]
3 years ago
7

Twice the sum of a number and 3 is the same as 5 subtracted from the number. find the number.

Mathematics
1 answer:
12345 [234]3 years ago
3 0
Translating this sentence into symbols:  2(x+3) = x - 5

So 2x + 6 = x - 5                    and x = -11

Check:  Is 2(-11+3) = -11 -5?               Is -16 = -16?  YES.  x =-11 is right.
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X+2y=9 and x=2y+1<br><br>helppppppppppppppppp meeeeereeer​
skelet666 [1.2K]

Answer: y = 2

Step-by-step explanation:

we need to use systems of equations, basically since we know what x equals, we plug that into first equation so:

since x=2y+1,

we can say that:

(2y+1)+2y=9

then we solve this equation,

first we expand the brackets- 2y+1+2y=9,

then we combine like terms- 4y+1=9

then we take 1 away from both sides- 4y=8

then we divided both sides by 4

y=2

Hope this helps xx

5 0
2 years ago
Read 2 more answers
Which is true about the domain and range of each function? Both the domain and range change. Both the range and domain stay the
user100 [1]

Answer:

D

The range stays the same, but the domain changes

Step-by-step explanation:

Just took the test

3 0
3 years ago
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Find the area of this circle. Use 3 for T.<br> A = ar2<br> 1 ft<br> [?] ft2
malfutka [58]
3 ft^2

A= 3(1)^2
A=3•1
A=3
4 0
3 years ago
Whats the word phrase of 49+m?
Arturiano [62]
The sum of 49 and m.
3 0
3 years ago
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If a4 = 625, what does (a) equal?
Reika [66]

I'm assuming you meant to write a^4 = 625.

If that is the case, then note how 625 = 25^2, and how a^4 is the same as (a^2)^2

So we go from this

a^4 = 625

to this

(a^2)^2 = 25^2

Apply the square root to both sides and you'll end up with: a^2 = 25

From here, apply the square root again to end up with the final answer: a = 5 or a = -5

As a check:

a^4 = (-5)^4 = (-5)*(-5)*(-5)*(-5) = 25*25 = 625

a^4 = (5)^4 = (5)*(5)*(5)*(5) = 25*25 = 625

Both values of 'a' work out

4 0
3 years ago
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