3 more than twice a number is 15 what is the number

Mathematics

2 answers:

Mnenie [13.5K]3 years ago

6 0

2x+3=15

2(6)+3=15
12+3=15 ✅

vredina [299]3 years ago

4 0

The number is 6 for this

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Can anyone pls help me with this, I don't even know where to start? I can also give Brainliest

svetoff [14.1K]

The interior angles of a parallelogram will always equal 360. The interior angles of a triangle are 180 if it is a equilateral triangle then the angles are 60 degrees each. You know 2 sides of parallelogram. The 100 degree and 90 degree. You can find the one opposing the x because it’s on a straight line and a straight line is 180 degrees if a triangle is 60 degree angle then the opposing angle to complete the straight line must be 180-60 so you get 120. You now know 3 sides. 120, 90 and 100
They should add up to be 360 so you can set up an equation like so
120+90+100+x=360
And x = 50

6 0

3 years ago

Read 2 more answers

4x = -36<br> plz helpppp

san4es73 [151]

Hi there! :)

4x=-36

Divide both sides by 4 in order to isolate x:

x=-9

Hope this helps you and have a nice day!

~Just a joyful teen

$SilentNature$

8 0

2 years ago

PLEASE PLEASE HELP

noname [10]

Answer:

$8.51x10^{-3}cm$

Step-by-step explanation:

In order to add or subtract numbers in scientific notation, the powers of ten must have the same exponent. In this caes the diameter of an average human body cell is a power of -4 and the diameter of a plant cell is a power of -3. In order to add them, we can move the decimal over for the body cell diameter:

$5.1x10^{-4}=0.51x10^{-3}$