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3 years ago

Best deal?2oz for 4.99 or 6oz for 9.85

Mathematics

1 answer:

maw [93]3 years ago

6 0

4.99 /2 = 2.495

9.85/6 =1.641666666

The 6 oz is a better deal

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How do you solve two step equations like 2x+1=9

IrinaVladis [17]

$2x+1=9$
subtract 1 from both sides
$2x=8$
divide by 2 on both sided
$x=4$

7 0

3 years ago

Read 2 more answers

Match the cofactors to their corresponding entries in the matrix.

Masja [62]

Answer:

The co-factors and their values are shown in the table below.

Step-by-step explanation:

We are given the matrix, $\begin{bmatrix}3&7&1\\7&1&-3\\8&5&1\end{bmatrix}$ .

It is required to match the co-factors with the corresponding values.

As, the co-factors are given by,

$A_{c_{ij}}$ = $(-1)^{i+j}(d)$ , where the d= determinant of the matrix after removing the i- row and j- column.

So, we have,

1. $A_{c_{11}}$ .

So, $A_{c_{11}}=(-1)^{1+1}(1\times 1-5\times (-3))$

i.e. $A_{c_{11}}=(-1)^{2}(1+15)=16$

2. $A_{c_{13}}$ .

So, $A_{c_{13}}=(-1)^{1+3}(7\times 5-1\times 8)$

i.e. $A_{c_{13}}=(-1)^{4}(35-8)=27$

3. $A_{c_{21}}$ .

So, $A_{c_{21}}=(-1)^{2+1}(7\times 1-5\times 1)$

i.e. $A_{c_{21}}=(-1)^{3}(7-5)=-2$

4. $A_{c_{22}}$ .

So, $A_{c_{22}}=(-1)^{2+2}(3\times 1-8\times 1)$

i.e. $A_{c_{22}}=(-1)^{4}(3-8)=-5$

5. $A_{c_{31}}$ .

So, $A_{c_{31}}=(-1)^{3+1}(7\times (-3)-1\times 1)$

i.e. $A_{c_{31}}=(-1)^{4}(-21-1)=-22$

Thus, we get,

Co-factor Value

$A_{c_{11}}$ 16

$A_{c_{13}}$ 27

$A_{c_{21}}$ -2

$A_{c_{22}}$ -5

$A_{c_{31}}$ -22

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3 years ago

The Galen Middle School is building a new bicycle storage shed in the school yard. On a carpenter's blueprint, the scale reads 1

slega [8]

Answer:

Width = 3a

Height = 6a

Step-by-step explanation:

Given the following :

Scale = 1 in = 3 feets

Doorway frame on blueprint= a inches wide ; 2a inches High

Actual dimension of the doorway:

Since 1 in represent 3 feets

Actual doorway frame dimension will be :

Width = 3 * a = 3a

Height = 3 * 2a = 6a

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3 years ago

56 + -90 times positive 2 subtract -17

Neporo4naja [7]

Answer:

-51

Step-by-step explanation:

56 - 90= -34

times two = -68

minus -17 =-51

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3 years ago

A rectangle has side lengths of 4 feet and 8 feet. How can you change the side lengths so the rectangle will have half the area?

djverab [1.8K]

Half the area: 2 by 8

Quarter of the area: 2 by 4

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3 years ago