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2 years ago

HELP How does the subtraction part of the expression change when a(b - c) is expanded?

Mathematics

1 answer:

drek231 [11]2 years ago

7 0

Answer:

The variables change

Step-by-step explanation:

Since we can't subtract c from -b we multiply both variables by a because the question is telling us to subtract b and c then multiply the awnser by a, but we don't know what b and c is so we just multiply b and c by a. In the end we get ab-ac

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Anna buys a sweater for $25.60, and it is on sale for 35% off. What is the amount of the discount?

inysia [295]

To find the answer of this question, you have to multiply 25.60*0.35, since 35% equals 0.35 and the original price of the sweater was 25.60. After you do this, you should get $8.96 as the amount of the discount.

4 0

2 years ago

Read 2 more answers

For 20 Points. 3 Qs. I also gave you guys a help sheet. PLEASE HELP.

Eduardwww [97]

Wat is help sheet, didn't help,

instructions unclear, got my calculator stuck in the ceiling fan

remember some simple exponential laws
$( x^{n} )(x^{m})=x^{n+m}$ and
$\frac{x^{n}}{x^{m}} =x^{ n-m }$
$x^{-m}= \frac{1}{x^{m}}$

first one
$(2^{-6})(2^{3})=2^{-6+3}=2^{-3}= \frac{1}{2^{3}} = \frac{1}{8}$

2nd one
$\frac{7^{5}}{7^{3}} =7^{ 5-3 } = 7^{2} = 49$

third one
$(3^{-4})(3^{2})=3^{-4+2}=3^{-2}= \frac{1}{3^{2}} = \frac{1}{9}$

dunno wat to do with 'help sheet'

4 0

2 years ago

Copland completes in 27 swimming events this season. He wins either first place or second place in each event. Copland has 3 mor

lubasha [3.4K]

Answer:

First Place wins in 15 events

Second Place wins in 12 events

Step-by-step explanation:

Let

the number of events winning first place be "f"

the number of events winning second place be "s"

Total 27 swimming events, we can write:

$f+s=27$

First place wins is THREE MORE than 2nd place wins, so we can write:

$f=s+3$

Replacing 2nd equation in 1st equation, we can solve for "s":

$f+s=27\\(s+3)+s=27\\2s+3=27\\2s=24\\s=12$

We know

f = s + 3

so,

f = 12 + 3

f = 15

Thus,

First Place wins in 15 events

Second Place wins in 12 events

5 0

2 years ago

What is the median of 26, 30, 24, 32, 32, 31, 27, and 29? 32 29 30 29.5?

aalyn [17]

First put both in other
24,26,27,30,31,32,32 = 30
29,29,29.5,30,32 =29.5

add them together
=59.5

or if your question is all the numbers together
24,26,27,29.5,29,29,30,30,31,32,32,32= 29+30
= 29.9

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2 years ago

Can someone help? Please explain as well?

irga5000 [103]

Multiply 29 cm and 18 cm

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2 years ago