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ratelena [41]
3 years ago
7

If (angle)1 = 7x and (angle)4 = 3x + 20, what is the value of x?

Mathematics
2 answers:
Semenov [28]3 years ago
7 0
The value of x is 5. Angle one and four are vertical. You can do this by writing 7x = 3x + 20. Isolate the variable by moving 3x to the other side. If you do this, 3x becomes negative, and you end up with 7x-3x = 20 --> 4x = 20.
x=5.
FrozenT [24]3 years ago
4 0
m\angle 1=m\angle4\\\\therefore:\\\\7x=3x+20\ \ \ |-3x\\\\4x=20\ \ \ |:4\\\\x=5

Answer: 5

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The temperature dropped from 6 Celsius to -5 Celsius.How many degrees did the temperature drop?
kakasveta [241]
-11 degrees. 6+5=11, and it went down, so negative 11 degrees

7 0
3 years ago
Read 2 more answers
Y and x have a proportional relationship, and y = 15 when x = 3. What is the value of x when y = 4?
Ksju [112]
In a proportional relationship, x and y will increase at the same rate. In order to find the value of x when y=4, we first have to find the ratio of x:y. We can do this by creating a fraction. After we know the ratio, simply replace the y value with 4 and solve for x. Here's the math:

y=15 when x=3       given values

y/x = 15/3 = 5          ratio of y to x

y=5x                        equation representing the proportional relationship 

4=5x                        replace y with 4

4/5=x                       divide both sides by 5 to isolate x

Answer: The value of x=4/5 when y=4.

Hope this helps!


6 0
3 years ago
I can't figure it out. <br>2x+2y=2<br>-4x+4y=12<br>​
koban [17]

Answer:

how to solve 2x+2y=2 , -4x+4y=12

this is  solving equations using substitution .... i have ALOT more but i juss dnt get this stuff

2x + 2y = 2      -4x + 4y = 12

x + y = 1

x = 1 - y

-4x + 4y = 12

-4(1 - y) + 4y = 12

(-4 + 4y) + 4y = 12

-4 + 8y = 12

8y = 16

y = 2

2x + 2y = 2

2x + 2(2) = 2

2x + 4 = 2

2x = -2

x = -1

Check.

-4x + 4y = 12

-4(-1) + 4(2) = 12

4 + 8 = 12

Answer: x = -1 and y = 2

Step-by-step explanation:

6 0
3 years ago
What is the answer to this 2x - 5 = 7
SCORPION-xisa [38]

Step-by-step explanation:

2x - 5 = 7

2x = 7 + 5

2x = 12

x = 12 / 2

x = 6

Hope it will help :)

7 0
3 years ago
Questions linked below
marusya05 [52]

Answer:

The blur of the photo I do not understand sorry

Step-by-step explanation:

ty for the points

5 0
3 years ago
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