2 years ago

21.4.2 Quiz: Introduction to Proofs

Mathematics

1 answer:

attashe74 [19]2 years ago

4 0

Answer:

B. A conclusion proved by deductive reasoning

Step-by-step explanation:

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7 kg of soybean oil which costs $4/kg were combined with 14kg of canola oil which cost $1/kg. Find the cost per kg mixture

Dmitry [639]

Answer:

Cost per kg = $2

Step-by-step explanation:

Given that:

7kg of soybean oil costs $4/kg

So 7kg of soybean oil will cost = 7 * 4 = $28

14kg of canola oil costs $1/kg

So 14kg of canola oil will cost = 1* 14 = $14

Now for mixture:

Quantity of (soybean oil + canola oil) = Cost of (soybean oil + canola oil)

7kg + 14kg = $28 + $14

21kg = $42

Now finding cost per kg of mixture:

Cost per kg = $42/21

Cost per kg = $2

i hope it will help you!

5 0

4 years ago

Let W be a point between points U and V on . If UV = 13, UW = 2y – 9, and WV = y – 5, solve for y.

MariettaO [177]

You would do 9/2
9/2=4.5
2*4.5=9

6 0

3 years ago

Read 2 more answers

A student is solving the equation. 2x – 4 – (x + 2) = 6x If the student solves the equation correctly, what is the value of x ?

ANTONII [103]

Answer:

x = $-\frac{6}{5}$

Step-by-step explanation:

2x – 4 – (x + 2) = 6x is the given equation

Now simplifying both sides, we get

2x - 4 - x - 2 = 6x

taking like terms on each side of the equality, we get

2x - x - 6x = 4 + 2

or, -5x = 6

or x = $\frac{6}{-5}$

hence, the value of x = $-\frac{6}{5}$

7 0

3 years ago

Hamburger sells for 3 pounds for $6. If Samantha buys 10 pounds of hamburger, how much will she pay

emmainna [20.7K]

The correct answer is: $20

Explanation:

3 pounds of hamburger is $6.

1 pound of hamburger is $\frac{\textdollar 6}{3} = \textdollar 2$

Now,

10 pounds of hamburger is $\textdollar 2 * 10 = \textdollar 20$

Hence the correct answer is $20.

8 0

3 years ago

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Solve the equation<br> what does x equal to<br> 46+x÷6−21=25+6

Diano4ka-milaya [45]

Answer:

×=36

Step-by-step explanation:

46+1/6X-21=31

25+1/6X=31

1/6X=31-25

1/6X=6

X=36

7 0

3 years ago