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Dovator [93]
3 years ago
7

What is the answer for x+y=5 and 3x-y=7 using substitution

Mathematics
1 answer:
Otrada [13]3 years ago
8 0
Y = -5 + x

y = 3x - y
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Can someone help me out
vichka [17]

Answer: LAST OPTION.

Step-by-step explanation:

The Pythagorean Theorem states the following relationship between the three sides of a triangle that has an angle of 90 degrees, known as "Right triangle":

a^2=b^2+c^2

Where "a"is the hypotenuse and "b" and "c" are the legs of the right triangle.

If the triangle ABC is a right triangle then AB must be equal to BC^2+AC^2, then, you need to substitute the values into  a^2=b^2+c^2 to check this:

12^2=5^2+10^2\\144\neq 125

Then the triangle ABC is not a right triangle.

Therefore, the statement that justifies why this triangle is not a right triangle is:

5^2+10^2\neq 12^2

5 0
3 years ago
Help: drag the simplified value in the box to match each expression
Ivahew [28]
First one:
9
Second one:
3
Third one:
4

Hope this helps and good luckk u can do thissss :)
6 0
3 years ago
2/3 cup of sugar for every 4 tablespoons
svetlana [45]

Answer:

2.6 (6 is recurring)

Step-by-step explanation:

2/3 x 4

= 2.6

8 0
3 years ago
Pick one for me plz I need help
tia_tia [17]

Answer:

9 /15 and 18/30

Step-by-step explanation:

9/15 is literally just 18/30 simplified

3 0
3 years ago
There are white, and red boats in a marina. Two-thirds of the boats in the marina are white, 4/7 of the remaining boats are blue
Over [174]

Answer:

105 boats

Step-by-step explanation:

Let x be the total number of boats in the marina.

If Two-thirds of the boats in the marina are white.

Fraction of the remaining boat= 1-⅔ =⅓

4/7 of the remaining boats are blue.

4/7 of ⅓ are blue

4/7 X ⅓ = 4/21 are blue

Fraction of Red Boats =

1-(Proportion of white Boats +Proportion of Blue Boats)

= 1-(2/3+4/21)=1/7

If there are 15 red boats,

1/7 of the total boats =15

1/7 X x=15

x=15X7

x=105

There are 105 boats in total on the marina

8 0
3 years ago
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