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3 years ago

7

Solve: 18/20 - 3/5 = ?

2 answers:

aivan3 [116]3 years ago

8 0

Answer; 1

Step-by-step explanation:

18/20-3/5

15/15

Alinara [238K]3 years ago

5 0

Answer:

6/20 or 3/10

Step-by-step explanation:

You just convert the second fraction's denominator to equal the first's (and modify the numerator accordingly), then subtract the numerators, in this instance, you muliply the 5 by 4 and what you do the bottom, you must do to the top, so you multiply 3 by 4 and get 12. 18 - 12 = 6, giving you 6/20, which converted is 3/10.

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X<br>81** *34*=246<br><img src="https://tex.z-dn.net/?f=81x%20%2B%201%20%2B%203%7B4x%20%7D%20%3D%20246" id="TexFormula1" title="

anzhelika [568]

Answer:

$x=\frac{1}{4}$

Step-by-step explanation:

$81^{x+1}+3^{4x}=246$

$81=3^4$

Rewrite equation: $3^{4\left(x+1\right)}+3^{4x}=246$

$3^{4\left(x+1\right)}=3^{4x}\times 3^4$

$3^{4x}\times 3^4+3^{4x}=246$

Factor out $3^{4x}$ :

$3^{4x}\left(3^4+1\right)=246$

Divide both sides by $(3^4+1)$ :

$\frac{3^{4x}\left(3^4+1\right)}{3^4+1}=\frac{246}{3^4+1}$

$3^{4x}=\frac{246}{3^4+1}$

$3^{4x}=\frac{246}{82}$

$3^{4x}=3$

Anything to the power of 1 is itself. Hence,

$4x=1\\$

$x=\frac{1}{4}$

3 0

4 years ago

Which answer choice correctly identifies the extraneous information in the problem?Samuel is 10 years old. He mowed the neighbor

charle [14.2K]

Answer:

D

Step-by-step explanation:

no reason for the question to include his age

4 0

3 years ago

Read 2 more answers

PLS HELP! WILL GIVE BRAINLIEST

Leviafan [203]

Answer:

The center (2, 2.5), radius $\sqrt{37}$ / 2

Step-by-step explanation:

<u>The standard form of the equation of a circle is: </u>

( x - h )^2 + ( y - k )^2 = r^2, where ( h, k ) is the center and r is the radius

<u>Rewrite the given equation in the standard form:</u>

2x^2 + 2y^2 - 8x + 10y + 2 = 0
x^2 - 4x + y^2 + 5y = -1
x^2 - 4x + 2^2 + y^2 + 5y + (5/2)^2 = -1 + 4 + 25/4
(x - 2)^2 + (y + 2.5)^2 = 37/4

<u>The center is:</u>

(2, 2.5)

<u>And radius is:</u>

<u /> $\sqrt{37}$ / 2

4 0

3 years ago

The daily sales at a convenience store produce a normal distribution with a mean of $1,250 and a standard deviation of $125. The

timama [110]

Answer:

0.6844 is the required probability.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = $1,250

Standard Deviation, σ = $125

We are given that the distribution of daily sales is a bell like shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

We have to find

P(sales less than $1,310)

$P( x < 1310) = P( z < \displaystyle\frac{1310 - 1250}{125}) = P(z < 0.48)$

Calculation the value from standard normal z table, we have,

$P(x < 1310) =0.6844= 68.44\%$

0.6844 is the probability that sales on a given day at this store are less than $1,310.

4 0

3 years ago

-6 (-2/3)<br> How is it solved

Mars2501 [29]

You multiply -6 and -2/3. Which is 4

5 0

3 years ago

Read 2 more answers