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Masja [62]
1 year ago
9

Solve. |7x -5| = |8x -4

Mathematics
1 answer:
zhenek [66]1 year ago
5 0

Answer:

9/25 or -1/11

Step-by-step explanation:

2 outcome

1; 7x-5=18x-4

2;-(7x-5)=18-4

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Sholpan [36]
8 centemeters equals 3.15 inches
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3 years ago
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In how many year the interest will became equal to the principal is rs.1200 is deposited at the rate of 25% in a bank ​
mrs_skeptik [129]

Given:

Principal = Rs. 1200

Rate of interest = 25%

To find:

The time in which the interest will became equal to the principal.

Solution:

We have,

P=1200

r=\dfrac{25}{100}

r=0.25

If interest is equal to the principal, then

Amount=Principal+Interest

Amount=1200+1200

Amount=2400

The formula for amount is:

A=P\left(1+r)^n

Substituting A=2400, P=1200, r=0.25 in the above formula, we get

2400=1200(1+0.25)^n

\dfrac{2400}{1200}=(1.25)^n

2=(1.25)^n

Taking log on both sides, we get

\log2=\log(1.25)^n

\log2=n\log(1.25)               [\because \log a^b=b\log a]

\dfrac{\log2}{\log(1.25)}=n

n\approx 3.11

Therefore, the interest will became equal to the principal in about 3.11 years.

4 0
2 years ago
The time it takes runners to complete a certain marathon are normally distributed with a mean of 4.6 hours and a standard deviat
Yuki888 [10]
The time for this z-score is 3.28.

The formula for z-scores is

z = (X-μ)/σ

Using our information, we have

-1.2 = (X-4.6)/1.1

Multiply both sides by 1.1:
-1.2(1.1) = X - 4.6
-1.32 = X - 4.6

Add 4.6 to both sides:
-1.32 + 4.6 = X - 4.6 + 4.6
3.28 = X
7 0
3 years ago
Hi there can anyone help me with this question please
levacccp [35]
The answer is 4. The mean is 4 beacuse thats what you multiply ... and yeah

4 0
3 years ago
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What is the slope of a line perpendicular to a line that's passes through (3,8) and (1,-4)?
Serjik [45]

Answer:

-1/6

Step-by-step explanation:

First find the slope of the line through the points

m = (y2-y1)/(x2-x1)

    = (-4-8)/(1-3)

     = -12/-2

      =6

Now we need to find the slope of the line that is perpendicular

Perpendicular lines multiply to -1

6 * mp = -1

mp = -1/6

7 0
3 years ago
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