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3 years ago

Solve for y in simplest form: y^2+3y-4=0

Mathematics

2 answers:

Effectus [21]3 years ago

8 0

$y^2+3y-4=0 \\ \\ (y+4)(y-1)=0 \\ \\ y+4=0 \\ y=-4 \\ \\ y-1=0 \\ y=1 \\ \\ y=-4,1$

Mashcka [7]3 years ago

5 0

Y^2+3y-4=o
y^2+4y-y-4=0
y(y+4)-1(y+4)=0
(y-1)(y+4)=o
y=1 or y=-4

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What is 47/20 as a decimal

Whitepunk [10]

$x=decimal
 \\ 47 \ divided \ by \ 20 \ is \ 2.35
 \\ x=2.35
 \\$

5 0

3 years ago

Read 2 more answers

Can you please help me with this problem?

Hoochie [10]

Here you have to find which each variable is, for this you start of picking one equation,

x + 2y + 6z = 4
-3x + 2y - 2 = -4
4x + 2z = 16

depending the equation you pick you multiply that by a certain number that will give you the opposite of one of the other equations,
-1(x + 2y + 6z = 4)
= -x -2y - 6z = -4

With this you add or subtract it with the equation that has the same number or variable, or both,
In this case it will be the equation,
-3x + 2y + 6z = 4
You can use this one or the third equation since both have a positive 2y which will cancel with -2y from the new equation,
-x - 2y - 6z = -4
-3x + 2y -z = -4

= -4x -7z = -8
Now you since you just eliminated the variable (y) you now have 2 variables, and the last equation has only 2 variables, meaning now you find the answer to those to equations,

-4x -7z = -8
4x + 2z = 16

= -5z = 8
Now leave the variable by itself,
z = 8/5
Now you found the variable (z), with this just substitute on one of the equations we used to find (z) so you can find (x), after that substitute those answered to on of the original equations so you can find (y)

6 0

3 years ago

Spencer bought 5 1/2 pounds of potatoes and 3 3/4 pounds of tomatoes to make stew.

Advocard [28]

Answer:

9 1/4 pounds because you add the two fractions together

6 0

4 years ago

Read 2 more answers

To celebrate there 125 anniversary, a company in Germany produced 125 very expensive teddy bears. The bears,known as the "125 ka

liq [111]

Answer:

The cost of one bear is <u>$47,000</u>.

Step-by-step explanation:

The question is incomplete and the data is missing so the complete question with data is below with attached files:

To celebrate there 125 anniversary, a company in Germany produced 125 very expensive teddy bears. The bears,known as the "125 karat teddy bears", are made mohair,silk and gold thread and have diamond and sapphire eyes.

The chart shows the approximate cost of " 125 teddy bears". Based on the pattern, how much does one bear cost?

Now, to get the cost of one bear.

So, we solve it by using unitary method:

If 4 bears cost = $188,000.

Then 1 bear cost = $188000\div 4=47000$

Thus, cost of one bear is $47,000.

Now, we check it by using another pattern of the data:

If 7 bears cost = $329,000.

Then 1 bear cost = $329000\div 7=47000.$

Hence, the cost of one bear is $47,000.

Therefore, the cost of one bear is $47,000.

8 0

3 years ago

Help me please, i need to turn this in quick and im struggling.

erik [133]

Answer:

3) 0.75

5)96 pens

Step-by-step explanation:

3) 5 percent *15 =

( 5:100)*15 =

( 5*15):100 =

75:100 = 0.75

5) 48/4= 12

12*8=96

8 0

3 years ago