I dont understand how to do these three questions

Answers

Answer 1

Answer: 9.
Well the first has the angles being 3x+12,x,and 90 so they have to add up to 180 degrees because it is a triangle.
3x+12+x+90 = 4x+102 = 180 solve
4x+102=180
4x=78
x=19.5

Related Questions

These two functions represent the growth of two different bacterial cultures in terms of the number of bacteria after x days.f(x) = 2,000(2)^x (other one on the graph)Answer the following:A) Which function has the higher initial amount of bacteria? g(x) or f(x)B) Which function has the greater amount of bacteria after two days? g(x) or f(x)
For the right triangle shown, which expression represents the length of CA? a. 5cos(25°)b. 5tan(25°)c. 5/sin(25°)d. sin(25°)/5
a store advertises that customers can take 25%off the original price and then take an extra 10%off is this 35% of? explain
A -In 2000 , The United States government owed about $5.63 trillion to its creditors . The population of the United States was 282.4 million people . How much did the government owe per person in 2000 / Round to the nearest dollarB) In 2005 , the bebt had growth to $7.91 trillion , with a population of 296.9 million How much did the government owe per person ? Round to the nearest dollar. c- What was the percent increase in the average amount owed per person from 2000 to 2005 ? Thank you my friend ! please make sure you answer with all the step and information .
32 is 40 percent of what number

If ∠BAC = 17° and ∠CED = 17° are the two triangles, ΔBAC and ΔCED similar? If so, by what criterion?A) yes, by AA similarity criterion
B) yes, by SAS similarity criterion
C) yes, by SSA similarity criterion
D) no, not possible to tell.

Answers

Answer:

Option A is correct.

Yes, by AA similarity criterion

Step-by-step explanation:

AA(Angle-Angle) Similarity Criterion states that if two angles of one triangle are congruent to two angles of another triangle, then the triangles are similar.

In ΔBAC and ΔCED

$\angle BAC = \angle CED = 17^(\circ)$ [Angle] [Given]

$\angle C = \angle C$ [Angle] [Common angle]

Therefore, by AA similarity criterion;

$\triangle BAC \sim \triangle CED$

Therefore, ΔBAC and ΔCED are similar by AA similarity criterion.

If ∠BAC = 17° and ∠CED = 17° are the two triangles, ΔBAC and ΔCED similar? If so, by yes, by AA similarity criterion

Thank you for posting your question here at brainly. I hope the answer will help you. Feel free to ask more questions.

3x-5y=9
-4x+2y=2
Solve using algebraic methods.