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3 years ago

A student writes 5y*3 to model the relationship the sum of 5y and 3. explain the error

2 answers:

5 0

5y*3
This models the relationship as 5y times 3

But the question says to model the relationship as 5y plus 3.

Therefore, the right answer is 5y+3

!!!HOPE THIS HELPS!!!

mezya [45]3 years ago

4 0

So,

5y*3 is the open phrase the student uses to model "the sum of 5y and 3".

"The sum of" means addition. The student put 5y*3, while the sum of 5y and 3 is actually 5y + 3.

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If a toy truck is created in a 2:9 scale, and the wheel of the toy is 14cm wide, how wide is the actual wheel?

lesya [120]

Answer:63 cm

Step-by-step explanation:

Given

The scale of creation is 2:9

The width of the toy wheel is 14 cm

Suppose x is the actual width of the truck

$\therefore \dfrac{2}{9}=\dfrac{14}{x}\\\\\Rightarrow x=\dfrac{9}{2}\times 14=63\ cm$

Thus, the width of actual truck is 63 cm

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3 years ago

Four minus x equals negative two. 4 - x = -2. whats x?

Roman55 [17]

Answer:

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3 years ago

Read 2 more answers

Show that x+y:x-y=3:2

ycow [4]

We have,

x+y:x-y=3:2

To prove that, x+ y : x - y = 3:2.

x+y=3

And,

x+y = 2

Adding (1) and (2), we get

x+y+x-y=3+2

⇒2x=5

⇒ x =

Put x = in (1), we get

+y=3

⇒ y=3-=

x+y:x-y=

=3:2

So, x+y:x-y=3:2.

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3 years ago

Verify the identity. 4 csc 2x = 2 csc2x tan x

vlada-n [284]

Step-by-step explanation:

$4csc(2x) = 2csc^2(x) tan(x)$

We start with Left hand side

We know that csc(x) = 1/ sin(x)

So csc(2x) is replaced by 1/sin(2x)

$4 \frac{1}{sin(2x)}$

Also we use identity

sin(2x) = 2 sin(x) cos(x)

$4 \frac{1}{2sin(x)cos(x)}$

4 divide by 2 is 2

Now we multiply top and bottom by sin(x) because we need tan(x) in our answer

$2\frac{1*sin(x)}{sin(x)cos(x)*sin(x)}$

$2\frac{sin(x)}{sin^2(x)cos(x)}$

$2\frac{1}{sin^2(x)} \frac{sin(x)}{cos(x)}$

We know that sinx/ cosx = tan(x)

Also 1/ sin(x)= csc(x)

so it becomes 2csc^2(x) tan(x) , Right hand side

Hence verified

6 0

3 years ago

Jessica has two strings. The first string measures 80 centimeters and the second string measures 64 centimeters.She wants to cut

finlep [7]

Answer: 16 inches.

Step-by-step explanation:

given data:

length of string A = 80 centimeters.

length of string B = 64 centimeters.

step 1

we solve for the Highest common denominator between them.

highest common denominator = 16.

what this represents is that no string would be cut more than 16inches so they can all have equal lengths at the end of cutting.

4 0

3 years ago