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4 years ago

Solve the system by substitution.

Mathematics

1 answer:

kirill115 [55]4 years ago

7 0

Let's solve for x.

y=x−3

Step 1: Flip the equation.

x−3=y

Step 2: Add 3 to both sides.

x−3+3=y+3

x=y+3

Answer:

x=y+3

Let's simplify step-by-step.

−5x+9

There are no like terms.

Answer:

=−5x+9

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dangina [55]

Answer: $37.5^{\circ}$ or $37\dfrac{1}{2}^{\circ}$

Step-by-step explanation:

Given : The temperature of the liquid changed by $-82\dfrac{1}{2}^{\circ}C$ over $2\dfrac{1}{5}$ minutes.

We can write $[tex]82\dfrac{1}{2}=\dfrac{82\times2+1}{2}=\dfrac{165}{2}$

$2\dfrac{1}{5}=\dfrac{11}{5}$

Now, the statement becomes ,

The temperature of the liquid changed by $-\dfrac{165}{2}^{\circ}C$ over $\dfrac{11}{5}$ minutes.

i.e. temperature changed in $\dfrac{11}{5}$ minutes = $-\dfrac{165}{2}^{\circ}C$

Now, by Unitary method,

The temperature changed in 1 minute = $\dfrac{165}{2}\times\dfrac{5}{11}^{\circ}C$

⇒ The temperature changed in 1 minute = $37.5^{\circ}$ or $37\dfrac{1}{2}^{\circ}$

4 0

3 years ago

Plz help I wanna make a good grade

Andrews [41]

#9)
answer is D.
8C > -2C > -4C

#10) answer is C.
You got it correct

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