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Grace [21]
4 years ago
4

Grace and Jim each bought notebooks for school. Grace bought 4 notebooks for $4.80. Jim bought 3 notebooks for $3.90. Find the u

nit cost for each student’s notebooks. Then, determine which student found the better buy.
Mathematics
2 answers:
Strike441 [17]4 years ago
8 0

Answer:

 

$1.20 per notebook; $1.30 per notebook; Grace

Step-by-step explanation:

Is The Accurate Answer....

        VOTE BRAINLEST PLZZZZZZ

Lady_Fox [76]4 years ago
3 0
$4.80/4 = $1.20
$3.90/3 = $1.30
4 notebooks for $4.80 is the better buy, it has a 10p cheaper per unit
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What is absolute value?
finlep [7]
Absolute value is when you have either a positive or negative value within a set of "parentheses" or what look just like vertical lines and whatever is within those line stays or becomes positive. The only exception to this is when there is a negative on the outside to act upon the positive values within.
8 0
3 years ago
Read 2 more answers
Given that $x \le -7,$ identify all the correct conclusions. (A) $3x \le -21.$ (B) $3x \ge -21.$ (C) $-3x \le 21.$ (D) $-3x \ge
exis [7]

Answer:

Options A and D are correct choices.

Step-by-step explanation:

We have been given an inequality x\leq -7 and we are asked to find the correct options from our given choices.

Let us solve inequalities in our given options one by one to see which of these matches with our given inequality.

(A) 3x\leq -21  

x\leq \frac{-21}{3}

x\leq -7

We can see that option A gives the same answer as our given inequality, therefore, option A is the correct choice.

(B) 3x\geq -21

x\geq \frac{-21}{3}

x\geq -7

This inequality represented in option C gives solution that x should be greater than or equal to -7, which is opposite to our given inequality, therefore, option B is incorrect.

(C) -3x\leq 21

Dividing inequality by a negative number swaps inequality sign.

x\geq \frac{21}{-3}

x\geq -7

This inequality gives solution that x should be greater than or equal to -7, which is opposite to our given inequality, therefore, option C is incorrect.

(D) -3x\geq 21  

Dividing inequality by a negative number swaps inequality sign.

x\leq \frac{21}{-3}

x\leq -7

We can see that option D gives the same answer as our given inequality, therefore, option D is the correct choice.  

8 0
4 years ago
Which of these strategies would eliminate a variable in the system of equations?
valentinak56 [21]
8x+8y=2
-) 8x+5y=1
——————
3y=1
y=1/3
8x+8(1/3)=2
24x+8=6
24x=-2
x=-1/12
(-1/12,1/3)
4 0
4 years ago
Read 2 more answers
Solve the equation 7x-c=k for x
Vlad1618 [11]

Answer:

x=k+c over 7

Step-by-step explanation:

7x-c+c=k+c

7x=k+c

divide both sides by 7

4 0
3 years ago
B. Find the equation of the line through (-3, 3) with slope 4.
yarga [219]

Answer:

Step-by-step explanation:

use the formula y=mx+b. the first number in the parenthesis is -3 so that is x. 3 is y and the slope is m

so it is 3=4(-3)+b

4 0
3 years ago
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