The steps below show the incomplete solution to find the value of x for the equation

Mathematics

2 answers:

viktelen [127]3 years ago

7 0

The correct answer would be 4x=20.

givi [52]3 years ago

6 0

4x-5=-6+21
4x - 5= 15
4x= 20 ÷4
x= 5

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X + 10 = 2x solve for x

Nady [450]

Answer:

Step-by-step explanation:

10 + 10 = 2x

2x = 20

10 + 10 = 20

x = 10

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4 years ago

1. if m 2. if m<b =45 what is the perimeter of the trapezoid.

nika2105 [10]

Answer:....

Step-by-step explanation:

first we need to find the base of the triangle, so the total is 20, they also give us 12, so we subtract 20-12=8 now divide. 8/2=4. Now we use the 4 and the 60. We use SOH-CAH-TOA, they give us the base now we need to find AB which is the hypotenuse. So we take out the TOA, and the 4 is the adjacent so we take out the SOH, we have CAH now, so we use cos. Now equation time....

$cos60=\frac{4}{x}$ since x is the bottom we switch $\frac{4}{cos60}$ , which equals 8. AB=8.

Now to find the perimeter. We still use the 4 to find the hypotenuse so we can find the outside side. For this one they tell us to use 45, so now lets see what method we use. SOH-CAH-TOA. We need the hypotenuse and they give us the adjacent, so we use cos again. Now setting up the equation...

$cos45=\frac{4}{x}$ x is at the bottom again to we switch.