3 years ago

Someone PLEASE help me with these 2 questions?? thank you!

Mathematics

1 answer:

Alexxandr [17]3 years ago

7 0

Answer:

40. D. 5x-14

Step-by-step explanation:

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PLEASE HELP SOLVE THESE!! DUE IN AN HOUR!! THANK YOU:))

astra-53 [7]

Answer:

1, (2,5)

2, (6,2)

3, (-5,9)

Step-by-step explanation:

OMG I was doing the same thing solving by elimination. can I get the brainlest? Pls

7 0

3 years ago

. The Bakers Dozen bakery sells apple, cherry, and pumpkin pies.Yesterday, the bakery sold 14 more apple pies than cherry pies a

Dominik [7]

Answer:

They sold 40 pies in total. Hope this helped =)

3 0

3 years ago

Read 2 more answers

The augmented matrix of a consistent system of five equa- tions in seven unknowns has rank equal to three. How many parameters a

ale4655 [162]

Answer:

4 parameters are necessary to specify all solutions and correspond to the number of free variables of the system.

Step-by-step explanation:

Remember that the number of free variables of a system is equal to m-rank(A) where m is the number of unknowns variables and A is the matrix of the system.

Since the system is consistent and the rank of the matrix is 3 then echelon form of the augmented matrix has two rows of zeros.

Then m-rank(A)=7-3=4.

6 0

3 years ago

Find the area of an equilateral triangle (regular 3 Gon) with the given measurement 9 in perimeter a=SQ.in

blsea [12.9K]

Answer:

3.897 $in^{2}$

Step-by-step explanation:

equilateral triangles are also equiangular, meaning the have equal angles.

Triangle sum theory says that angles of a triangle add up to 180.

That means each angle is 60.

A = bh/2

You need the (h). The base of is 3. Perimeter = 9, so each side is 3

Draw a perpendicular line for the height. The line cuts the base in half (1.5)

Using trigonometry you can find the height.

tan 60° = h/1.5

h = height, 1.5 is half of 3, 60° is the base angle.

multiply each side by 1.5

1.5(tan 60°) = h

h=2.598

then substitute h into formula

A= <u>(2.598)(3) </u>

A = 3.897 rounded

4 0

3 years ago

Wade borrowed $12,500 from his uncle at 4.5% simple interest to use for travel and repaid the loan in 4 years. How much did he p

natali 33 [55]

12,500 / 100 = 125 125 x 4.5 = 562.5 562.5 x 4 = 2250
2250 + 12,500 = 14,750 He paid back a total of $14,750. Hope this helps :)

7 0

3 years ago