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3 years ago

Solve using substitution. 8x + 5y = 4 x = 3 What is x and y?

Mathematics

2 answers:

Sloan [31]3 years ago

6 0

Answer: y=-4

Step-by-step explanation:

8(3)+5y=4

24+5y=4

subtract each side by 24

5y=-20

divide by 5

5 y=-4

solong [7]3 years ago

5 0

Answer: x = 3 : y = -4

Step-by-step explanation:

8x + 5y = 4

8(3) + 5y = 4

5y = 4 - 8(3)

5y = 4 - 24

5y = -20

(5y)/5 = -20/5

y = -4

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In a sample of 77 children , the mean age as at which they first began to combine words was 16.51 months

astraxan [27]

Answer:

Mean age = 1271.27

Step-by-step explanation:

No of children = 77

The age at which children first began to combine words = 16.51 months

Mean age = No of children × age at which children first began to combine words

= 77 × 16.51

= 1271.27

Mean age = 1271.27

7 0

3 years ago

How do I get the answer to number 4

elixir [45]

Hello,

You have 7 balloons and in total, they cost 9.1. dollars. To find the unit price per balloon simply divide 9.1. by 7.

You'll get 1.3, OR 1.30.

To check your answer simply use inverse operations. Multiply 7 by 1.3 or 1.30 (it doesn't matter); you'll end up with the starting value 9.1.

Thus, the unit price per balloon is $1.30.

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7 0

3 years ago

Help me find x please

Sedaia [141]

Answer:

$\displaystyle 13 = x$

Step-by-step explanation:

All three angles in an equilateral triangle are equivalent, and they sum up to 180°, so each angle measures 60°:

60° = [8x - 44]°

+ 44° + 44°

____________

$\displaystyle \frac{104°}{8} = \frac{[8x]°}{8} \\ \\ 13° = x$

I am joyous to assist you anytime.

6 0

3 years ago

PLS HELP ME ASAP ON THIS!! THANK U SM!!

ankoles [38]

"Any strategy" includes letting a calculator solve it.

We find the tea costs $0.80 and the gum $0.45, so the price of Rocco's purchase will be $4.90.

3 0

3 years ago

What expression is equivalent to 8x-12y+32?

kompoz [17]

Answer:

divide all terms by same numeral

Step-by-step explanation:

4x-6y+16

2x-3y+8

4 0

2 years ago

Read 2 more answers