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Virty [35]
3 years ago
10

Write an expression with with (-1) as its base that will produce a positive product, and explain why your answer

Mathematics
1 answer:
Angelina_Jolie [31]3 years ago
7 0

Answer:

(-1)^4 = 1

Because negative 1 raised to an even exponent results in a positive number.

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What is the value of x
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Well i atleast know its not 10 lol
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3 years ago
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The ratio of red cars to blue cars in a parking lot was 5 : 3. If there were 40 red cars how many blue cars were there?
andreyandreev [35.5K]
Every 5 red cars there are 3 blue cars
so if there are 40 red cars there are going to be  24 blue cars
8 0
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This pattern follows the rule multiply by 2. What other feature do you observe? 4, 8, 16, 32, 64, 128
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4 0
3 years ago
The 7th grade class experienced a 15% decrease in enrollment. Last year, the 7th grade class had 280 students. How many students
Monica [59]

238 students are enrolled in the 7th grade class this year

<u>Solution:  </u>

Given that

Percentage decrease in number of students enrolled in 7th grade = 15%

Number of students enrolled last year = 280  

Need to determine number of students enrolled in 7th grade this year.

Lets assume number of students enrolled this year = x  

<em>Percentage decrease in enrollment </em>= (Number of student enrolled last year – Number of students enrolled this year) whole divided by number of students enrolled last year multiplied by 100

\begin{array}{l}{\Rightarrow 15=\frac{280-x}{280} \times 100} \\\\ {=>15 \times 280=28000-100 x} \\\\ {=>100 \mathrm{x}=28000-4200=23800} \\\\ {\Rightarrow x=\frac{23800}{100}} \\\\ {\Rightarrow x=238}\end{array}

Hence number of students enrolled this year = 238.

7 0
4 years ago
0.9x-2.1+0.9=0.2(5-x)
VARVARA [1.3K]
.9x-2.1+.9=.2(5-x) multiply .2(5-x)
.9x-2.1+.9=1-.2x; add - 2.1 + .9
.9x-1.2=1-.2x; cancel -2x by adding it by itself and add it  on the .9x
1.1x-1.2=1; cancel -1.2 by adding it by itself and add it  on the 1
1.1x=2.2; divide 1.1 so it can be canceled and then on 2.2
x=2 :)
7 0
4 years ago
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