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2 years ago

$7.95 lunch; 15% tip

Mathematics

2 answers:

gavmur [86]2 years ago

7 0

Answer:

Ok $1.19 tip.

Step-by-step explanation:

So 7.95 (0.15)= 1.1925

round to nearest dollar, $1.19

natulia [17]2 years ago

4 0

Answer:

1.1925 dollars

Step-by-step explanation:

1% of 7.95 is 0.0795

0.0795 x 10 = 0.795

0.0795 x 5 = 0.3975

15% = 1.1925 dollars

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Using Cramer's rule to solve linear systems.

Rzqust [24]

Answer: Last Option

$x=2,\ y=-5$

Step-by-step explanation:

Cramer's rule says that given a system of equations of two variables x and y then:

$x =\frac{Det(A_X)}{Det(A)}$

$y =\frac{Det(A_Y)}{Det(A)}$

For this problem we know that:

$Det(A) = |A|=\left|\begin{array}{ccc}4&-6\\8&-2\\\end{array}\right|$

Solving we have:

$|A|= 4*(-2) -(-6)*8\\\\|A|=40$

$Det(A_X) = |A_X|=\left|\begin{array}{ccc}38&-6\\26&-2\\\end{array}\right|$

Solving we have:

$|A_X|=38*(-2) - (-6)*26\\\\|A_X|=80$

$Det(A_Y) = |A_Y|=\left|\begin{array}{ccc}4&38\\8&26\\\end{array}\right|$

Solving we have:

$|A_Y|=4*(26) - (38)*8\\\\|A_Y|=-200$

Finally

$x =\frac{|A_X|}{|A|} = \frac{80}{40}\\\\x=2$

$y =\frac{|A_Y|}{|A|} = \frac{-200}{40}\\\\y=-5$

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2 years ago

If you spend $99.79, in how many ways can you receive change from a one hundred-dollar bill?

MAXImum [283]

Answer:

3 different ways

Step-by-step explanation:

100 - 99.79 = 0.21

.21 = 2 dimes and 1 penny

.21 = 4 nickels and 1 penny

.21 = 1 dimes, 2 nickels and 1 penny

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Molodets [167]

Answer:

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Step-by-step explanation:

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2 years ago

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What is the distance between R(–3, 1) and S(4, 5)?<br><br> Round to the nearest tenth.

Fed [463]

The answer is (-7,4)

$\binom{ - 3}{1} - \binom{4}{5} = \binom{ - 7}{4}$

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