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2 years ago

Does anyone know how to do this

Mathematics

1 answer:

Ne4ueva [31]2 years ago

4 0

Answer:

y = 1

Step-by-step explanation:

4 - (y-3) = 3(y+1) - 4(1 - y)

4 -y +3 = 3y + 3 - 4 + 4y

7 - y = 7y - 1

7 + 1 = 7y + y

8 = 8y

8/8 = y

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Help please!! i don’t understand this one!

12345 [234]

Answer:

C, D

Step-by-step explanation:

This equation can be solved any of several ways. One that doesn't require much thought is using the quadratic formula.

For ax² +bx +c = 0, the solutions are ...

$x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}$

In the given equation, a=2, b=11, c=5, so this becomes ...

$x=\dfrac{-11\pm\sqrt{11^2-4\cdot2\cdot5}}{2\cdot2}=\dfrac{-11\pm\sqrt{81}}{4}\\\\x=\dfrac{-11\pm9}{4}=\left\{-\dfrac{20}{4},-\dfrac{2}{4}\right\}=\{-5,-\frac{1}{2}\}$

The solutions are ...

C. x = -5

D. x = -1/2

_____

My personal favorite is using a graphing calculator. The solutions are the x-intercepts of the expression on the left. That is, where its value is zero, as the equation says.

5 0

3 years ago

Solve for g in the proportion. 42/g = 14/10 g =

NeX [460]

Cross mutiply. 42*10= 420. 14*g= 14g

14g= 420

divide by 14 for both sides

14g/14= 420/14

g= 30

Check answer by using substitution method

42/30. Divide by 3 . 42/3= 14 , 30/3= 10

14/10 and 14/10 equal to each other by dividing 2.

14/2= 7 , 10/2= 5

7/5= 7/5

Answer: g= 30

6 0

2 years ago

Read 2 more answers

Bill has $35 more than Jill. After Jill gave Bill $13, Bill had twice as much money as Jill. How much money did they have altoge

kozerog [31]

Answer:

48 all together

7 0

3 years ago

What is 1 2/3 as an improper fraction

Troyanec [42]

It is 5/3 ......................

7 0

3 years ago

Read 2 more answers

Number 16 find the distance between the two points

Fittoniya [83]

use the distance formula for this which is:
Sqrt[ (x2-x1)^2 + (y2-y1)^2]
If that is hard to read look it up but pretty much its:
Sqrt [(-12 -12)^2 + (-2-5)^2]
Sqrt [(0)^2 + (-7)^2]
Sqrt [49]
7

7 0

3 years ago

Does anyone know how to do this ​

Does anyone know how to do this