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bogdanovich [222]

2 years ago

11

2.5 What is the difference between relational understanding and instrumental

1 answer:

Afina-wow [57]2 years ago

3 0

Answer:

Instrumental understanding – having a mathematical rule and being able to apply and manipulate it. Relational understanding – having a mathematical rule, knowing how to use it AND knowing why it works.

Step-by-step explanation:

Instrumental understanding involves “memorising which problems a method works for and which not, and also learning a different method for each new class of problems” (Skemp 1987, p. 159), is a desire to know “some kind of rule for getting the answer” (p. 155) so that a student can “latch on it and ignore the rest”

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shirley owns a diner. she decides to charge $1.50 for 2 egga and one piece of toast a $.90 for one egg and one piece of toast. w

charle [14.2K]

Answer:

1 toast costs $0.30 and 1 egg cost $0.60

Step-by-step explanation:

Let price of 1 egg be $e$ and price of 1 toast be $t$

<u>"$1.50 for 2 eggs and one piece of toast":</u>

We can write $2e+t=1.50$

<u>"$.90 for one egg and one piece of toast":</u>

We can write $e+t=0.90$

Now, we can solve the first equation for t and substitute that into 2nd equation and solve for e:

$t=1.50-2e\\Also\\e+t=0.90\\Substituting:\\e+(1.50-2e)=0.90\\e+1.50-2e=0.90\\-e=0.90-1.50\\-e=-0.6\\e=0.6$

Now using the value of e (0.6) and putting it back in the first equation, we will get t:

$2e+t=1.50\\2(0.6)+t=1.50\\1.2+t=1.50\\t=1.50-1.20\\t=0.30$

Hence, 1 toast costs $0.30 and 1 egg cost $0.60

8 0

3 years ago

The Mountain Spring Water Company is moving their backup supply of drinking water to a different site. Each tank weighs accordin

amm1812

Linear, because the X is increasing by one!

5 0

3 years ago

Three fifth of a number -21 what’s the number

iVinArrow [24]

Answer:

$The\:number\:is\:-35$

Step-by-step explanation:

$Let\:x\:be\:the\:number,\:we\:have\:an\:equation:\\\frac{3x}{5}=-21\Leftrightarrow 3x=-105\Rightarrow x=-35$

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3 years ago

Write 6.453 × 10–^3 without exponents?

GaryK [48]

Answer:

6.453 × 10 × -10 × -10 × -10

Step-by-step explanation:

6.453 × 10–^3

6.453 × 10 × -10 × -10 × -10

Is that a negative? The one after the 10? If not then just take away the negatives from the 10's.

Hope this helped!

Have a supercalifragilisticexpialidocious day!

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3 years ago

A pack of cinnamon-scented pencils sells for $9.00. What is the sales tax rate if the total cost of the pencils

maw [93]

The sales tax rate is 7%

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3 years ago