2 years ago

_____+67-34=72 plzzz help me

Mathematics

2 answers:

Vaselesa [24]2 years ago

6 0

ax ndw/klfme'lwmqasxdefrtghy6u7jygtrfasStep-by-step explanation:

sveticcg [70]2 years ago

4 0

Answer:

Solve everything backwards

It REALLY helps!

Step-by-step explanation:

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2. Suppose (220)_b and (251)_b are the squares of consecutive integers. Determine b.

Andrei [34K]

Let $x$ and $x+1$ be these consecutive integers. For some base $b$ , we can write

$(x_{10})^2=220_b=2b^2+2b$

$((x+1)_{10})^2=251_b=2b^2+5b+1$

$x^2=2b^2+2b$

then

$x^2+1=2b^2+2b+1$

Now,

$x^2+2x+1=2b^2+5b+1$

$2x+2b^2+2b+1=2b^2+5b+1$

$\implies2x=3b$

Squaring both sides gives

$4x^2=9b^2$

and so

$4(2b^2+2b)=9b^2$

$\implies8b^2+8b=9b^2$

$\implies b^2-8b=0\implies\boxed{b=8}$

(because the base has to be non-zero)

3 0

2 years ago

-5x= -15 solve for x

cricket20 [7]

Answer:x=3

Step-by-step explanation:

-5x=-15

divide by -5

x=3

7 0

3 years ago

Read 2 more answers

Elsa earns 5140 for working 20 hours

lys-0071 [83]

Answer:

$2.57

Step-by-step explanation:

divide 5,140 by 20,

5,140/20=257=2.57

7 0

2 years ago

Does any one knows the scale factor?

Black_prince [1.1K]

Yes in science it’s the scale factor of the division barns end. Dive o Ebro dodo ooo
Hey jm correct answer

6 0

2 years ago

At 6:00 A.M. the temperature was 33°F. By noon the temperature had increased by 10°F and by 3:00 P.M. it had increased another 1

sergij07 [2.7K]

Answer:

The temperature needs to decrease by 7°F to return to the original temperature.

Step-by-step explanation:

The temperature starts at 33 degrees then increases by 10 then 12 then decreases by 15 which will equal 40.

33 + 10 = 43

43 + 12 = 55

55 - 15 = 40

40 - 33 = 7

The temperature needs to decrease by 7 degrees.

5 0

2 years ago

_____+67-34=72 plzzz help me​

_____+67-34=72 plzzz help me