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Gennadij [26K]
3 years ago
7

Simplify the expression 2√ 20 − 3√ 7 − 2√ 5 + 4√ 63 .

Mathematics
2 answers:
earnstyle [38]3 years ago
8 0

Answer:

The simplified form is,

\boxed{\boxed{6\sqrt{5}+9\sqrt{7}}}

Step-by-step explanation:

The given expression is,

=2\sqrt{20}-3\sqrt{7}+2\sqrt{5}+4\sqrt{63}

=2\sqrt{4\times 5}-3\sqrt{7}+2\sqrt{5}+4\sqrt{9\times 7}

=2(\sqrt{4}\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(\sqrt{9}\times \sqrt{7})

=2(2\times \sqrt{5})-3\sqrt{7}+2\sqrt{5}+4(3\times \sqrt{7})

=4\sqrt{5}-3\sqrt{7}+2\sqrt{5}+12\sqrt{7}

=4\sqrt{5}+2\sqrt{5}+12\sqrt{7}-3\sqrt{7}

=6\sqrt{5}+9\sqrt{7}

Tema [17]3 years ago
5 0
The simplified expression is 2sqrt(5)+9sqrt(7)
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St 2
Lubov Fominskaja [6]

Answer:

$5.5

Step-by-step explanation:

6 * N (notebook) + 3 * P (pen) = 27

n = 1.5 +P

6 * (1.5 + P) + 3 * P = 27

9 +6p +3p = 27

9p = 18

p (pen): $2

N (notebook): $3.5

combined cost of 1 pen and 1 notebook: $2 + $ 3.5 = $ 5.5

3 0
3 years ago
Five times a number increased by 8 is seven less than 6 times the number. Find the number.
maksim [4K]

Answer:

15 = x

Step-by-step explanation:

3 0
3 years ago
PLEASE HELP ASAP
neonofarm [45]

Answer:

9 Quarters

8 Dimes

3 Nickels

Step-by-step explanation:

We let the number of quarters be q

number of dimes be d

and

number of nickels be n

Since quarters are worth 0.25, dimes are worth 0.10 and nickels are worth 0.05 and total worth is 3.20, we can write an equation as:

0.25q + 0.10d + 0.05n = 3.20

Next,

3 times as many quarters as Nickels, we can write:

q = 3n

and

5 more dimes than nickel, we can write:

d = n + 5

Substituting these last 2 equations in the first and solving for n gives us:

0.25q + 0.10d + 0.05n = 3.20

0.25(3n) + 0.10(n+5) + 0.05n = 3.20

0.75n + 0.10n +0.5 + 0.05n = 3.20

0.9n = 2.70

n = 2.70/0.9 = 3

n = 3

We know q = 3n, so

q = 3(3) = 9

Also, we know d = n + 5, which means:

d = 3 + 5 = 8

Thus,

There are:

9 Quarters

8 Dimes

3 Nickels

5 0
3 years ago
Finally, find the y-value for x=0.96 by substituting x=0.96 in the original equation and solving for y using a computer or calcu
Sati [7]
To answer this, we need the original equation.
4 0
3 years ago
4m + 2(8) = 5(8) solve for m
ollegr [7]

Answer:

m = 6

Step-by-step explanation:

4m + 2(8) = 5(8) (Given)

4m + 16 = 40 (Simplify)

4m + 16 - 16 = 40 - 16 (Subtraction Property of Equality)

4m = 24 (Simplify)

\frac{4m}{4} = \frac{24}{4} (Division Property of Equality)

m = 6 (Simplify)

3 0
3 years ago
Read 2 more answers
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