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3 years ago

How many 4-digit palindromes contain both the digits 1 and 2

Mathematics

1 answer:

guapka [62]3 years ago

3 0

4 digit palindromes must be of form abba, so being required that you use both numbers, you only have two: 1221 and 2112

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Y=-x-4 <br>y=x<br><br>solve system of equations algebraically

Serhud [2]

Answer:

y=-2 x=-2

Step-by-step explanation:

y=-x-4

y=x

you can plug y in for x in the first equation by using substitution

y=-y-4

and then you solve for y

2y=-4

y=-2

so y equals -2. Since y=x, x also equals -2. Therefore

y=-2 x=-2

4 0

3 years ago

!Brainliest!

harina [27]

Answer:

m = 3

n = 14

p = 2

Step-by-step explanation:

Given:

$\frac{7}{x}-\frac{3}{2}=\frac{n-mx}{px}$

We need to find the values of m, n, p

Solution:

We will first solve the L.H.S

L.H.S = $\frac{7}{x}-\frac{3}{2}$

Now we will first make the denominator common by taking L.C.M

$=\frac{7\times 2}{x\times 2}-\frac{3\timesx}{2\timesx}\\\\= \frac{14}{2x}-\frac{3x}{2x}$

Now the denominator is common hence we will subtract the numerators.

L.H.S $= \frac{14-3x}{2x}$

Now Comparing the the value of L.H.S with R.H.S we can say that;

$\frac{14-3x}{2x}=\frac{n-mx}{px}$

m = 3

n = 14

p = 2

4 0

3 years ago

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A cyclist travels 15km due north and then 18 km due east. How far is she from the starting point?

zavuch27 [327]

Answer:

DONT KNOW SRY

Step-by-step explanation:

8 0

2 years ago

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iren [92.7K]

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2 years ago

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Hank estimates the width of the door to his classroom in feet. What is a reasonable estimate?

Gnoma [55]

3-4 feet would be a good estimate I think

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3 years ago