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3 years ago

Find the area of triangle ABC

Mathematics

2 answers:

Stells [14]3 years ago

7 0

Area : 14
-you can count the squares in the coordinate plane near the triangle shape

-find the height of the triangle
height : 4

-find the base of the triangle
base: 7

use the triangle formula
1/2bh
and your answer will be 14
( sorry if incorrect, I’m pretty sure it is! )

vivado [14]3 years ago

4 0

7 I see. It on the test

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Pls help with all 4 questions, and show a step by step explanation (show how you set up the problems)

Ainat [17]

<h2>Answer:</h2>

Question 10:

21.75 ÷ 30 = 0.725

Move the decimal backwards 2 times

72.5

Answer: 72.5%

Question 11:

Sales: $768

Commission Rate: 4%

Commission: $30.72

768 x 4 = 3,072

3,072 ÷ 100 = 30.72

Answer: $30.72

Question 12:

Selling Price: $39.98

Tax Rate: 4.5%

Sales Tax: $1.80

39.98 x 4.5 = 179.91

179.91 ÷ 100 = 1.7991

Then you round to the thousandths.

1.799

1.8

Answer: $1.80

Question 13:

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Answer: $28.20 gratuity is added to the bill.

8 0

2 years ago

X + y = 3, 4y = -4x - 4 System of Equations

alexdok [17]

Answer:

no solutions

Step-by-step explanation:

Hi there!

We're given this system of equations:

x+y=3

4y=-4x-4

and we need to solve it (find the point where the lines intersect, as these are linear equations)

let's solve this system by substitution, where we will set one variable equal to an expression containing the other variable, substitute that expression to solve for the variable the expression contains, and then use the value of the solved variable to find the value of the first variable

we'll use the second equation (4y=-4x-4), as there is already only one variable on one side of the equation. Every number is multiplied by 4, so we'll divide both sides by 4

y=-x-1

now we have y set as an expression containing x

substitute -x-1 as y in x+y=3 to solve for x

x+-x-1=3

combine like terms

-1=3

This statement is untrue, meaning that the lines x+y=3 and 4y=-4x-4 won't intersect.

Therefore the answer is no solutions

Hope this helps! :)

The graph below shows the two equations graphed; they are parallel, which means they will never intersect. If they don't intersect, there's no common solution