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frosja888 [35]
3 years ago
13

Which of the following matrices does not have an inverse?​

Mathematics
1 answer:
Margarita [4]3 years ago
6 0
I think it is the second one
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Nolan has some nickels and some dimes. He has no more than 19 coins worth no less than $1.30 combined. If Nolan has 5 nickels, d
Allushta [10]

Answer:

number of dimes 11 to 14

Step-by-step explanation:

given data

coin = 19

worth no less = $1.30

Nolan nickles = 5

solution

we convert 5 cent to dollars, it will be

5÷100 = $0.05

and

dime is worth 10 cents

so it will be 10 ÷ 100 = $0.1

so we consider here x as the number when nickels.

and we consider y as the number of dimes.

so here we can say

x + y ≤ 19      ..........................1

as here no less than $1.30 combined.

so

0.05 x + 0.1 y ≥ 1.3       ......................2

and

when Nolan has 5 nickels

put x = 5 in eq 1

5 + y ≤ 19  

y ≤ 19 - 5

y ≤ 14

and

now we put x = 5 in eq 2

0.05 × 5 + 0.1y ≥ 1.3

0.25 + 0.1y ≥ 1.3

0.1y ≥ 1.3 - 0.25

0.1y ≥ 1.05

y ≥ 10.5

so all possible values for the number of dimes 11 to 14

7 0
3 years ago
Given D = 5, E = 10 and F = 4, evaluate D• E/F<br> 1/2<br> 2<br> 25/2
marshall27 [118]

Answer:

25/2

Step-by-step explanation:

D = 5, E = 10 and F = 4,

D• E/F

5 * 10/4

Multiply  and Divide from left to right

50/4

25/2

4 0
3 years ago
PLEASE HELP I WILL GIVE BRAINLIEST!!!!
Vladimir79 [104]

Answer: Let's solve for x.

2x−10y=10

Step 1: Add 10y to both sides.

2x−10y+10y=10+10y

2x=10y+10

Step 2: Divide both sides by 2.

2x

2

=

10y+10

2    answer

    x=5y+5

Step-by-step explanation:

Let's solve for s.

sx+9y=9

Step 1: Add -9y to both sides.

sx+9y+−9y=9+−9y

sx=−9y+9

Step 2: Divide both sides by x.

sx

x

=

−9y+9

x

s=

−9y+9

x

Answer:                         hope this helps:)

s= -9y+9/x

6 0
3 years ago
1. Name a pair of supplementary angles in this figure.
bulgar [2K]

Answer:

FEJ and JED

Step-by-step explanation:

Supplementary means that the pair of angles add up to 180° or a straight angle. FEJ and JED are both 90° and so they add up to 180° But there are many pairs of angles that are NOT 90° that add up to 180° (but they just weren't in the answer choices)

6 0
2 years ago
Read 2 more answers
Which expressions are polynomials?
statuscvo [17]

Answer:

They all are polynomials.

Step-by-step explanation:

Given : Following expression

1)  x^2+5x^{15}

2)  -x^2+5x

3) 6x^2+5x

4) -7x^2+53x

The following all are polynomials because polynomials are:

An expression consisting of variables and coefficients or expression more than two algebraic terms and the terms that contain different powers of the same variable(s) involve operations addition , subtraction, multiplication and non-negative integer exponent of variables.

So when we see to these functions they all are a mixture of a polynomial.

7 0
3 years ago
Read 2 more answers
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