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aalyn [17]
3 years ago
13

HELP ASAP ILL GIVE BRAINLIST AND POINTS

Mathematics
1 answer:
vesna_86 [32]3 years ago
7 0

Answer:

<u>system of equations: </u>set of one or more equations involving a number of variables

<u>substitution method: </u>

1. Solve one equation for one of the variables.

2. Substitute (plug-in) this expression into the other equation and solve.

3. Resubstitute the value into the original equation to find the corresponding variable.

<u>ex:</u>

-4x+3y=-2           y=x-1

plug in: -4x+3(x-1)=-2

simplify:  -x-3=-2

              -x=-2+3

              -x=1

answer:  x=1

You might be interested in
Domain and range of -3x^2+16x+3
Zarrin [17]

Answer:

<=16  

Step-by-step explanation:

3 0
3 years ago
3.4=21 2.5=7. 4.4=؟​
Licemer1 [7]

Answer:

32

Step-by-step explanation:

From the given values

The possible logic could be

if x.y is given

then it is equal to=\frac{(x+y)\times x}{y-3}

For 1st example

3.4=\frac{(3+4) \times 3}{4-3} =\frac{21}{1} =21

For 2nd example

2.5=\frac{(2+5) \times 2}{5-3} =\frac{7 \times 2}{2} =7

⇒4.4=\frac{(4+4)\times 4}{4-3} =32

4 0
4 years ago
X ^ 2 + 4x - 7 = 0<br><br> Solve using the Quadratic Formula
aalyn [17]

There's a special case of the quadratic formula called the Shakespeare Quadratic Formula (2b or -2b) that applies when the linear coefficient is even.

x^2-2Bx + C \textrm{ has zeros }x = B \pm\sqrt{B^2 - C}

If you're planning on solving a lot of quadratic equations quickly, it's good to know.

Here we have

x^2 + 4x - 7 = 0

so

x = -2 \pm \sqrt{2^2 - -7}

x = -2 \pm \sqrt{11}

8 0
3 years ago
Charmaine cutaway 3.65 meters of rope. Before that, she had 9 meters of rope. How much rope does Charmaine have left?
mihalych1998 [28]

Answer:

5.35

Step-by-step explanation:

9-3.65=5.35

4 0
3 years ago
Por favor me ajuda<br> (Please Help Me)
Rainbow [258]

The missing number would be 100.

e.g 400/2= 200

200/2= 100

100/2 = 50

50/2 = 25

5 0
2 years ago
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