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vova2212 [387]
3 years ago
11

Which of the following expressions is equivalent to the one above? 42x + 21.

Mathematics
1 answer:
stiks02 [169]3 years ago
6 0

Answer:

21(2x+1)

Step-by-step explanation:

42x+21=21(2x+1)

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joan is rolling a six— sided numbers cube with 1—6 on the sides. what is the probability that she will roll a numbers less tha 3
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1/3 because only 1 and 2 is less than 3 out of the 6 numbers. 2/6 = 1/3.
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85% of the students in Yvan’s school walk to school. If 816 students walk to school, how many students are in the school?
storchak [24]
<h2>Hello There today we will solve your problem</h2>

\huge\red{\mid{\underline{\overline{\textbf{QUESTION}}}\mid}}

<em>85% of the students in Yvan’s school walk to school. If 816 students walk to school, how many students are in the school?</em>

<em />

<em>Response-</em>

Since we are using percents we can make an equation out of this question

\frac{85}{100}=\frac{816}{x}

\frac{85}{100} is the way we write percents in math as a fraction

and \frac{816}{x} is the part and whole you gave us

\frac{85}{100}=\frac{816}{x} cross multiply

85x=81600\\divide\\x=960students are in the school

\huge\blue{\mid{\fbox{\tt{ANSWER}}\mid}}

  • 960 students at Y'vans school
6 0
2 years ago
in a class of 20 students, 40% are boys. 25% of the boys and 50% of the girls wear glasses. How man students wear glasses?
statuscvo [17]
20 students.

40% are boys. (40/100)*20 = 0.4 * 20 = 8 boys.
Girls= 20 - 8 =  12 girls.

25% of the boys wear glasses. = (25/100)*8 = 0.25*8 = 2 boys wear glasses.
50% of the girls wear glasses. = (50/100)*12 = 0.50*12 = 6 girls wear glasses.
   
Total students that wear glasses = 2 + 6 = 8 students.
8 students wear glasses.
7 0
2 years ago
Which of the following is not a rate?<br> 35km/5 min 240miles/8 miles 95 words/1 minute 16oz/1 lb
Shkiper50 [21]

Answer:

240 miles/ 8 miles

Step-by-step explanation:

you can't measure a mile per mile (/=per)

6 0
2 years ago
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