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serious [3.7K]
3 years ago
13

42/x = 5/2 what is the value of x​

Mathematics
2 answers:
Rina8888 [55]3 years ago
7 0

Answer:

\huge \fbox \pink {A}\huge \fbox \green {n}\huge \fbox \blue {s}\huge \fbox \red {w}\huge \fbox \purple {e}\huge \fbox \orange {r}

\frac{42}{x}  =  \frac{5}{2}  \\ x = \frac{5}{2}  \times 42 \\ x = 5 \times  \frac{42}{2}  \\ x = 5 \times 21 \\ x = 105

✏ The value of <u>x is 105.</u>

ʰᵒᵖᵉ ⁱᵗ ʰᵉˡᵖˢ

\huge\blue{ \mid{ \underline{ \overline{ \tt ꧁❣ ʀᴀɪɴʙᴏᴡˢᵃˡᵗ2²2² ࿐ }} \mid}}

Butoxors [25]3 years ago
3 0

Answer:x=84/5

Solve x by cross multiplying.

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A deli sells two types of sandwiches, tuna salad and BLT. The profit on the sandwiches is $1.50 for tuna and $2.50 for the BLT.
Korolek [52]
X = tuna, y = BLT

x + y = 30
6x + 9y = 240

3y = 60
y = 20

x = 10

20 BLTs for $2.50, 10 tuna for $1.50
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3 years ago
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The sum of five times a number and 6 is 21. What is the number?
Nataliya [291]

Answer: it’s 3

Step-by-step explanation:

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4 years ago
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If f(x) = 6x - 4, evaluate –<br> -forx=8.<br> A.-2<br> B.-11<br> C.44<br> D.11
nignag [31]
C.44 8x6 is 48-4 is 44
8 0
3 years ago
Assume that X, the starting salary offer for sociology majors, is normally distributed with a mean of $43,256 and a standard dev
Sphinxa [80]

Answer:

a) 95.54% or 0.9554

b) 61.08% or 0.6108

c) 33.39%

Step-by-step explanation:

It is given that the distribution of the salaries follow a normal distribution, so we will use the concept of z-scores to answer the given questions.

Mean salary = u = $ 43,256

Standard Deviation = \sigma = $ ,3150

Part a) Probability that salary is less than $ 48,600

We have to find Probability (Salary < 48600). In symbolic form we can represent this by P(X < 48600).

We can solve this problem, by converting this value to corresponding z score, and using z table to find the said probability.

The formula of z scores is:

z=\frac{x-u}{\sigma}

Using the values, we get:

z=\frac{48600-43256}{3150}=1.70

So, P(X < 48600) is equivalent to P(z < 1.70). Using the z-table we can find the probability of z score being less than 1.70 i.e.

P(z < 1.70) = 0.9554

Since, P(X < 48600) = P(z < 1.70), we can write:

The probability that a randomly selected sociology major received a starting salary offer less than $48,600 is 0.9554 or 95.54%

Part b) Probability that the salary is between 42,000 and 48,600

We have to find P(42000 < X < 48600). We will use the same method as used in the previous part. First we have to convert the given values to z scores.

42000 converted to z score will be:

z=\frac{42000-43256}{3150}=-0.40

48600 converted to z score will be:

z=\frac{48600-43256}{3150}=1.70

So,

P(42000 < X < 48600) = P(-0.40 < z < 1.70)

According to the symmetry and properties of z distribution, we can write:

P(-0.40 < z < 1.70) = P(z < 1.70) - P(z < -0.40)

= 0.9554 - 0.3446

= 0.6108

Since, P(42000 < X < 48600) = P(-0.40 < z < 1.70), we can conclude:

The probability that a randomly selected sociology major received a starting salary offer between $42,000 and $48,600 is 0.6108 or 61.08%

Part c) Percentage of salaries between 36000 and 42000

We have to find P(36000 < X < 42000). This question is exactly similar to the previous one, just with the change of values. So again, first we find the z scores.

36000 converted to z score will be:

z=\frac{36000-43256}{3150}=-2.30

42000 converted to z score will be:

z=\frac{42000-43256}{3150}=-0.40

So,

P(36000 < X < 42000) = P(-2.30 < z < -0.40)

= P(z < -0.40) - P(z < -2.30)

= 0.3446 - 0.0107

= 0.3339

Since, P(36000 < X < 42000) = P(-2.30 < z < -0.40), we can conclude:

The percentage of sociology majors received a starting offer between $36,000 and $42,000 is 0.3339 (33.39%)

7 0
3 years ago
10 • 10 • (-n) • (-n) • (-n)
djyliett [7]

Step-by-step explanation:

We're going to simplify the problem with exponents.

Exponents are a shortened way for explaining how many times a number will multiply itself.

<u>Example:</u>

3 \times 3 \times 3.

\: the \: number \: is \: multiplying \: by \: itself \: \: 3 \: times. \: the \: exponent \: is \: represented \: as: \:

{3}^{3}

<u>We can identify that:</u>

10 \times 10 =  {10}^{2}

( - n) \times ( - n) \times ( - n) =  ( - n)^{3}

<u>Therefore</u><u>,</u>

{10}^{2}  \times ( - n)^{3}

8 0
3 years ago
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