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finlep [7]
3 years ago
15

There are 18 girls in mr.brimleys class. If 60 percent of the students are girls how many students are in mr.brimley’s math clas

s?
Mathematics
1 answer:
emmainna [20.7K]3 years ago
8 0

Answer:

30 students in the class.

Step-by-step explanation:

There are several which in which we can approach this question:

We can do this question using direct proportion.

"If 18 girls represent 60%, how many students represent 100%?"

18

60

=

x

100

x

=

18

×

100

60

30

students altogether.

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A cashier checks the price of a dining room table that is marked $369, because it is usually rings up to, $410. What percentage
lara31 [8.8K]

Answer:

10% discount

Step-by-step explanation:

If you take 369 divided by 410 it gives you 0.9 which is equal to 90% which then leads us to realized that if 369 is 90% of 410 then the discount would have to be 10%

8 0
2 years ago
Read 2 more answers
Evaluate lim x→∞ (3x+1)^(4/x), using l'hospital's rule as needed. show all work using proper notation. as you show your work, if
Alborosie
\displaystyle\lim_{x\to\inty}(3x+1)^{4/x}=\lim_{x\to\infty}e^{\ln(3x+1)^{4/x}}=e^{\lim\limits_{x\to\infty}\ln(3x+1)^{4/x}}

\displaystyle\lim_{x\to\infty}\ln(3x+1)^{4/x}=\lim_{x\to\infty}\frac{4\ln(3x+1)}x\stackrel{\mathrm{LHR}}=\lim_{x\to\infty}\frac{4\frac3{3x+1}}1=\lim_{x\to\infty}\frac{12}{3x+1}=0

\implies\displaystyle\lim_{x\to\infty}(3x+1)^{4/x}=e^0=1
4 0
3 years ago
The distribution of SAT scores of all college-bound seniors taking the SAT in 2014 was approximately normal with a mean of 14971
RideAnS [48]

Answer:

P(X<1200) is 0.8212

Step-by-step explanation:

Test statistic (z) = (X - mean)/sd

X is score of a tester = 1200

mean = 1497

sd = 322

z = (1200 - 1497)/322 = -297/322 = -0.92

The cumulative area of the test statistic is the probability that X<1200. The cumulative area is 0.8212.

Therefore, P(X<1200) = 0.8212

8 0
3 years ago
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If x ≥ 0, then x + |x| = ?
oee [108]

Answer:

x + |x| = 2x

Step-by-step explanation:

if the number is more than 0 or greater, then if you add it to itself, it will be equal to the value of two of the previous number. Hope this helps

8 0
2 years ago
What is the slope of the line that contains the points (2, -6) and (-3, 1)?
Radda [10]

Answer:

The slope is m=-\frac{7}{5}

Step-by-step explanation:

The slope of the line passing through (x_1,y_1) and (x_2,y_2) is given by the formula;

m=\frac{y_2-y_1}{x_2-x_1}

The given line contains;the points (2, -6) and (-3, 1).

m=\frac{1--6}{-3-2}

m=\frac{1+6}{-3-2}

m=\frac{7}{-5}

The slope is m=-\frac{7}{5}

5 0
3 years ago
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