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Marina86 [1]
3 years ago
11

Math

Mathematics
1 answer:
N76 [4]3 years ago
8 0

Answer:

25

Step-by-step explanation:

if four is the ratio of blue to five then divide four by 20 blue because thats the number your finding and you get 5 so then you multiply 5 by 5 and you get 25

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How many values are between 30 and 50?
skad [1K]

between 30 and 50 is approximately 40

7 0
2 years ago
Assume y≠60 which expression is equivalent to (7sqrtx2)/(5sqrty3)
Drupady [299]

Answer:

The equivalent will be:

\frac{\sqrt[7]{x^2}}{\sqrt[5]{y^3}}=\left(\:x^{\frac{2}{7}}\right)\left(y^{-\frac{3}{5}}\right)

Therefore, option 'a' is true.

Step-by-step explanation:

Given the expression

\frac{\sqrt[7]{x^2}}{\sqrt[5]{y^3}}

Let us solve the expression step by step to get the equivalent

\frac{\sqrt[7]{x^2}}{\sqrt[5]{y^3}}

as

\sqrt[7]{x^2}=\left(x^2\right)^{\frac{1}{7}}      ∵ \mathrm{Apply\:radical\:rule}:\quad \sqrt[n]{a}=a^{\frac{1}{n}}

\mathrm{Apply\:exponent\:rule:\:}\left(a^b\right)^c=a^{bc},\:\quad \mathrm{\:assuming\:}a\ge 0

=x^{2\cdot \frac{1}{7}}

=x^{\frac{2}{7}}

also

\sqrt[5]{y^3}=\left(y^3\right)^{\frac{1}{5}}         ∵  \mathrm{Apply\:radical\:rule}:\quad \sqrt[n]{a}=a^{\frac{1}{n}}

\mathrm{Apply\:exponent\:rule:\:}\left(a^b\right)^c=a^{bc},\:\quad \mathrm{\:assuming\:}a\ge 0

=y^{3\cdot \frac{1}{5}}

=y^{\frac{3}{5}}

so the expression becomes

\frac{x^{\frac{2}{7}}}{y^{\frac{3}{5}}}

\mathrm{Apply\:exponent\:rule}:\quad \:a^{-b}=\frac{1}{a^b}

=\left(\:x^{\frac{2}{7}}\right)\left(y^{-\frac{3}{5}}\right)            ∵ \:\frac{1}{y^{\frac{3}{5}}}=y^{-\frac{3}{5}}

Thus, the equivalent will be:

\frac{\sqrt[7]{x^2}}{\sqrt[5]{y^3}}=\left(\:x^{\frac{2}{7}}\right)\left(y^{-\frac{3}{5}}\right)

Therefore, option 'a' is true.

5 0
3 years ago
Ethan buys a video game on sale. If the video game usually costs $39.99, and it was on sale for 20% off, how much did Ethan pay?
Ann [662]
Hello There!

Ethan would pay $31.99  or rounded up two 32 which ever is your answer choice 

Thus being why.

if you times 39.99 x .20 you get 7.998

39.99 - 7.998 is 31.99

Hope This Helps!
7 0
4 years ago
Read 2 more answers
Given the sequence {-2,6,-18......} write an explicit rule and find a8
Rudiy27

Answer:

4374

Step-by-step explanation:

common ratio is -3

geometric sequence

an = a1 * r^(n-1)

a8 = -2*-3^(8-1)

a8 = -2*-3^7

a8 = -2 * (-2187)

a8 = 4374

4 0
2 years ago
How many degrees in the angle
kotegsom [21]

Answer:

130 degrees

Step-by-step explanation:

No hate but it literally tells you the answer by the picture.

:)

4 0
4 years ago
Read 2 more answers
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