3 years ago

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Mathematics

1 answer:

spin [16.1K]3 years ago

7 0

The amount of substance unit is mol, the answer is c

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On circle OOO below, \overline{SE} SE start overline, S, E, end overline is a diameter. What is the measure of \angle ISE∠ISEang

sladkih [1.3K]

Answer:

Step-by-step explanation:

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3 years ago

Kelly and Greta are asked to write an equation for the scenario below. "One person was able to plant 4 trees in the same amount

Alina [70]

Answer:

$y=\dfrac{1}{4}x$

Kelly is correct.

Step-by-step explanation:

One person is able to plant 4 trees

Let x be the number of people

y be the number of trees

The situation is represented by

$1x=4y\\\Rightarrow y=\dfrac{1}{4}x$

5 people are able to plant 20 trees

$5x=5(4y)\\\Rightarrow 5x=20y\\\Rightarrow y=\dfrac{5x}{20}\\\Rightarrow y=\dfrac{1}{4}x$

So, the situation is represented by $y=\dfrac{1}{4}x$

Hence, Kelly is correct.

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3 years ago

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Help PLEASE!

laila [671]

Answer:

the first answer is correct Edge 2020

Step-by-step explanation:

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4 years ago

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Solve the simultaneous linear equations y=2x+1 and x+y=7

MissTica

Y=2x+1

x+y=7
x+(2x+1) =7
3x+1=7
-1 -1
3x=6
x=2------------> Y=2x+1
y=2(2)+1
y=5
X=2
Y=5

5 0

3 years ago

The length of the longer leg of a right triangle is 19ft more than five times the length of the shorter leg. the length of the h

dangina [55]

Let x represent the length of the shorter leg.

Longer leg: 5x +19
Hypotenuse: 5x +20

Pythagorean theorem:
.. x^2 +(5x +19)^2 = (5x +20)^2
.. x^2 +25x^2 +190x +19^2 = 25x^2 +200x +20^2 . . . . . . eliminate parentheses
.. x^2 -10x -39 = 0
.. (x -13)(x +3) = 0
.. x = 13 . . . . . . . . . . leg lengths must be positive

The side length of the triangle are 13, 84, 85 feet.

7 0

3 years ago