The first step would be to solve everything in the brackets. \(\displaystyle{2}+{3}{\left({9}-{5}\right)}={2}+{3}\times{4}\)

After that you solve the multiplication. \(2+12\)

And then you solve the addition. \(2+12=14\)

asked 2021-02-11

asked 2021-03-02

Solve this \(\frac{1}{3} ÷9\)

asked 2021-02-09

find the sum or the difference of \(28.6-9.84\)

asked 2021-01-06

a. \(4u-3v-w=0\)

b. \(4 \times 324 \times 32\)

c. \(4×(16×25)4×(16×25)\)

d. \((250+86)+50\)

asked 2020-11-05

An eighth-grade class rolls a number cube with faces labeled 1 through 6.

The results of 50 rolls are recorded in the table below.

Find the relative frequency that a number less than 4 is rolled.

\(\begin{array}{|c|c|}\hline \text{Outcome} & 11 & 22 & 33 & 44 & 55 & 66 \\ \hline \text{Frequency} & 66 & 44 & 88 & 1212 & 1010 & 1010 \\ \hline \end{array}\)

A number less than 4 was rolled \(\times ?\).

The number cube was rolled \(\times ?\).

The relative frequency of rolling a number less than 4 is \(?\%\).

asked 2021-02-08

Solve the following

\(125\times 16\)

asked 2021-06-14

A disc jockey has to choose three songs for the last few minutes of his evening show. If there are nine songs that he feels are appropriate for that time slot, then how many ways can he choose and arrange to play three of those nine songs?

asked 2021-04-13

As depicted in the applet, Albertine finds herself in a very odd contraption. She sits in a reclining chair, in front of a large, compressed spring. The spring is compressed 5.00 m from its equilibrium position, and a glass sits 19.8m from her outstretched foot.

a)Assuming that Albertine's mass is 60.0kg , what is \(\displaystyle\mu_{{k}}\), the coefficient of kinetic friction between the chair and the waxed floor? Use \(\displaystyle{g}={9.80}\frac{{m}}{{s}^{{2}}}\) for the magnitude of the acceleration due to gravity. Assume that the value of k found in Part A has three significant figures. Note that if you did not assume that k has three significant figures, it would be impossible to get three significant figures for \(\displaystyle\mu_{{k}}\), since the length scale along the bottom of the applet does not allow you to measure distances to that accuracy with different values of k.

a)Assuming that Albertine's mass is 60.0kg , what is \(\displaystyle\mu_{{k}}\), the coefficient of kinetic friction between the chair and the waxed floor? Use \(\displaystyle{g}={9.80}\frac{{m}}{{s}^{{2}}}\) for the magnitude of the acceleration due to gravity. Assume that the value of k found in Part A has three significant figures. Note that if you did not assume that k has three significant figures, it would be impossible to get three significant figures for \(\displaystyle\mu_{{k}}\), since the length scale along the bottom of the applet does not allow you to measure distances to that accuracy with different values of k.

asked 2021-01-31

1) \(-n+9n+3-8-8n\)

2) \(3(-4x+5y)-3x(2+4)\)

3) \(5-4y+x+9y\)

4) \(-2x+3y-5x-(-8y)\)

asked 2021-05-18

Lightning produces a maximum air temperature on the order of \(\displaystyle{9.3}\times{10}^{{{3}}}{K}\), whereas a nuclear explosion produces a temperature on the order of \(\displaystyle{9.2}\times{10}^{{{6}}}{K}\). Use Wien's displacement law to calculate the wavelength of the thermally-produced photons radiated with greatest intensity by each of these sources. Select the part of the electromagnetic spectrum where you would expect each to radiate most strongly.

(a) lightning

\(\displaystyle\lambda_{{\max}}\approx{n}{m}\)

b) nuclear explosion

\(\displaystyle\lambda_{{\max}}\approx\pm\)

(a) lightning

\(\displaystyle\lambda_{{\max}}\approx{n}{m}\)

b) nuclear explosion

\(\displaystyle\lambda_{{\max}}\approx\pm\)