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Artemon [7]
3 years ago
12

Alexis is training for her next 5k race. Her current 5k race time is 40minutes. She wants to decrease her time by 20%. What does

Alexis want her 5k race to be?

Mathematics
1 answer:
Darina [25.2K]3 years ago
4 0

Answer:

I think the answer is 32 minutes

Step-by-step explanation:

20/100×40

=8

=40-8

=32 minutes

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Where does the line y= x-10 cross the y-axis?
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Olivia is making granola bars. She will use 17.9 ounces of pistachios,12.6 ounces of almonds, 12.5 ounces of walnuts,and 12.5 ou
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3 0
4 years ago
Read 2 more answers
6a+ -12a plz explain (a=1/2) I don't know evaluating expressions
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Plug in the 1/2 where the a’s are answer is -3

7 0
3 years ago
Помогите, пожалуйста
Cerrena [4.2K]

1.

6 - 2х² = 6 - 2(-8)² = 6 - 2(64) = 6 - 128 = -122

2.

\displaystyle\tt a^{11}\cdot a^{14}=a^{11+14}=a^{25}\\\\a^{18}:a^{14}=a^{18-14}=a^4\\\\(a^5)^4=a^{5\cdot4}=a^{20}\\\\(5x)^4=5^4\cdot x^4=625x^4\\\\\bigg(\frac{a}{3}\bigg)^6=\frac{a^6}{3^6}=\frac{a^6}{729}

3.

\displaystyle\tt \frac{14^{16}\cdot14^{6}}{14^{21}}=14^{16+6-21}=14^1=14\\\\\\ \frac{7^{8}\cdot7^{5}}{7^{11}}=7^{8+5-11}=7^2=49\\\\\\ (12^2-11^2)^2+(6^5+2^9)^0=(144-121)^2+1=23^2+1=529+1=530

4.

\displaystyle\tt 3^{8x}=81\\\\3^{8x}=3^4\\\\8x=4\\\\x=\frac{4}{8}=\frac{1}{2}=0.5

5.

\displaystyle\tt \frac{64^{6}}{4^{4}\cdot4^{16}}=\frac{(4^3)^{6}}{4^{4+16}}=\frac{4^{3\cdot6}}{4^{20}}=\frac{4^{18}}{4^{20}}=\frac{1}{4^{2}}=\frac{1}{16}

5 0
4 years ago
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