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nexus9112 [7]
3 years ago
11

Gwendolyn is asked to solve the equation -4(x-3) = 20. She shows the work below and states that the solution is x=-8

Mathematics
1 answer:
bazaltina [42]3 years ago
8 0

Answer:

x = -2

Step-by-step explanation:

-4(x-3) = 20

-4x + 12 = 20

^ Here, Glendon added 12 to 20 instead of subtracting. Her equation was not balanced.

-4x = 8

x = -2

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What four consecutive intergers have a sum of -34
Ivenika [448]

Answer:

-7, -8 , -9 and -10 are such four integers.

Step-by-step explanation:

Let the first integer = k

So, the next three consecutive integers are ( k+1), ((k + 1) + 1)  and (((k + 1) + 1) +1)

or, k , (k +1), (k +2) and (k +3) are four consecutive integers.

Now, their sum is -34.

⇒k   + (k +1) +  (k +2) +  (k +3)  = -34

or, 4k  + 6 = -34

or, 4k = - 34 - 6 = -40

⇒  k = -40/ 4 = -10

Hence, the first integer k = -10

The next integer = k + 1 = -10 + 1 = -9

Similarly next two integers are -8 and - 7.

So -7, -8 , -9 and -10 are such four integers.

7 0
3 years ago
Please help me if you can
MA_775_DIABLO [31]

Answer:

y = .025x +20

The y intercept is the value when x = o, or the starting value.  In this case, it is the temperature in degrees F at a depth of 0 meters.

Step-by-step explanation:

We have a point a (0,20) and a point at (2 , 20.05)

We can find the slope from

m = (y2-y1)/(x2-x1)

   = (20.05-20)/(2-0)

   = .05/2

     =.025

One of the points (0,20) is the y intercept  since x=0

We can use the slope intercept form of the equation

y= mx+b

y = .025x +20


The y intercept is the value when x = o, or the starting value.  In this case, it is the temperature in degrees F at a depth of 0 meters.

3 0
3 years ago
Read 2 more answers
Write an inequality that represents the graph.
Dimas [21]

Answer:

y=2x+1

Step-by-step explanation:

Y intercept is 1 and slope is 2/1

5 0
3 years ago
What matrix results from −8·A?
djverab [1.8K]
Is that all the question says can you give it into more details


So I can help you out
3 0
2 years ago
A
Reika [66]

The value of x will be equal to x = 79.

<h3>What is the triangle?</h3>

Triangle is a shape made of three sides in a two-dimensional plane. the sum of the three angles is 180 degrees.

For an isosceles triangle, the value of two opposite angles is equal and the opposite sides are also equal.

The Sum of the three angles is equal to 180 degrees so the third angle will be calculated as:-

Angle = 180 - 142 - 19 = 19

Now applying Lami's theorem in the triangle we will get the third side.

\dfrac{sin\angle A}{a} = \dfrac{sin\angle B}{b} = \dfrac{sin\angle C}{c}

\dfrac{Sin 19}{42}= \dfrac{Sin142}{x}

x = \dfrac{42\times Sin 142}{Sin19}

x = 79

Therefore the value of x will be equal to x = 79.

To know more about triangles follow

brainly.com/question/17335144

#SPJ1

3 0
2 years ago
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