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mestny [16]
2 years ago
7

Can anyone help me with this expression -1(7 + 10r) + 3

Mathematics
1 answer:
mezya [45]2 years ago
6 0

Answer:

-2(2+5r)

Step-by-step explanation:

-(7+10r)+3

then you remove the parentheses

-7-10r+3

calculate the sum

-4-10r

factor the expression

-2(2+5r)

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Evaluate the dot product of (7, 5) and (- 5, 4)
melamori03 [73]

Answer:

The dot product of (7,5) and (-5,4) is -15

Step-by-step explanation:

Given

(7,5) and (-5,4)

Required

Determine the dot product

Dot product is calculated using the following formula;

a.b = {a_1b_1+a_2b_2+...+a_nb_n}

Let a = (7,5) and b = (-5,4);

The above formula becomes

a.b = {7*-5+5*4}

a.b = {-35+20}

a.b = {-15}

Hence, the dot product of (7,5) and (-5,4) is -15

5 0
3 years ago
Janet has $120. If she saves $20 per week, in how many days will she have $500
Burka [1]
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4 0
3 years ago
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two golfers completed one round of golf. the first golfer had a score of +6 and the second golfer had a score of -3. how many mo
pav-90 [236]
9. One is 6 over par, the other is three under, so subtract first-second = 6-(-3) = 9
4 0
3 years ago
if 3 half-gallon containers of ice cream on sale for $6.69,what is the price for 2 half-gallon containers?​
kvv77 [185]
<h3>Answer:  $4.46</h3>

===================================================

Work Shown:

3 containers = 6.69 dollars

3/3 containers = 6.69/3 dollars .... divide both sides by 3

1 container = 2.23 dollars

2*(1 container) = 2*(2.23 dollars) ... multiply both sides by 2

2 containers = 4.46 dollars

A shortcut is to start with "3 containers = 6.69 dollars" and multiply both sides by 2/3

Each mention of "container" refers to a half-gallon container.

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3 years ago
What’s the domain and range if this graph?
Kobotan [32]

Answer:

Step-by-step explanation:

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