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3 years ago

(-4y - 1) + (-9y -2)

Mathematics

2 answers:

Ber [7]3 years ago

8 0

Answer:

-13y-3

Step-by-step explanation:

(-4y - 1) + (-9y -2)

remove parenthesis

-4y - 1 + -9y -2

combine like terms

-13y - 1 - 2

now we subtract -1 -2 = -3 so

-13y- 3

soldier1979 [14.2K]3 years ago

4 0

Answer:
5y-3
Explanation:
I don’t know how to explain but here’s my work:

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Three numbers are in the ratio 3:9:10. If 10 is added to the last number, then the three numbers form an arithmetic progression.

MrRa [10]

Answer:

 The numbers are 6, 18, and 30 

Step-by-step explanation:

If the three numbers are in the ratio of 3:9:10,

let the numbers be 3x, 9x and 10x.

If 10 is added to the last number to form an arithmetic progression

Then, 3x 9x (10x+10) are the progression

The common difference of an arithmetic progression (d) = T₂ - T₁ = T₃ - T₂

T₂-T₁ = T₃ - T₂ .............. Equation 1

Where T₁ = first term of the progression, T₂ = Second term of the progression, T₃ = third term of the progression

Given: T₁ = 3x, T₂ = 9x, T₃ = 10x +10

Substituting these values into equation 1

9x-3x = (10x+10)-9x

Solving the equation above,

3x = 10+x

3x-x = 10

2x = 10

x = 10/2

x = 2.

Therefore the numbers are 6, 18, and 30 

7 0

3 years ago

C) Describe the relationship between E and K. What is the measure of K?

Rainbow [258]

Angles E and K are alternate exterior angles

8 0

2 years ago

Evaluate (-A)^2 for A = 5, B = -4, and C = 2

drek231 [11]

Answer:

(-A)^2 for A = 5

(-5)^2

=25

Step-by-step explanation:

first, replace A by 5, and maintain the negative to the 5.

multiply (-5)^2.

nb: don't forget to maintain the bracket when multiplying. if you maintain the bracket, you'll get a positive number, but if you don't, you'll get a negative number.

6 0

3 years ago

Please help ill give brainiest answer

trapecia [35]

Answer:

1: AAS, RQC 2: ASA, SRP

Step-by-step explanation:

(1) We are shown that two angles and one side are congruent in the order of AAS. Make sure you write the letters in terms of the corresponding angles. The angles and sides are congruent because the problem labels it for us. For example, B,A,C=R,Q,S. Answers: AAS, RQC.

(2) We are shown that two angles and one side are congruent in the order of ASA. Make sure you write the letters in terms of the corresponding angles again. For example, P,Q,R=P,S,R. The angles are congruent because the problem labels it for us. Side PR is congruent to side PR by reflexive property. Answers: ASA, SRP.

I hope this helped :) Good luck

4 0

3 years ago

Macaleh compared the prices of four different brands of coffee.

larisa [96]

Answer:

Brand 1

Step-by-step explanation:

4 Oz of coffee is 1.15

8 Oz of coffee is another 1.15 added, because it is another 4 Oz of coffee

12 Oz is another 1.15 added, it's another 4 Oz of coffee

And so on.

3 0

3 years ago