Please help me with this

Mathematics

2 answers:

Mamont248 [21]4 years ago

7 0

Since ABC is equal to DCB, you can use the angles given in triangle ABC in triangle DCB. Since the sum of the angles in a triangle is 180, the equation would be this:
90+46+x=180

Solve for x in that and you're good :)

Klio2033 [76]4 years ago

5 0

Use trig so the side with 4x-7 is also equal to 21sin(46)=15 so 4x-7=15.1. thus x=5.52 which is around 6

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What is the value of the expression when c=-5 and d=2 45 c+28d?

REY [17]

45c + 28d

45(-5) + 28(2)

-225 + 56

-169

Hope this helps! :)

7 0

4 years ago

If ( t+ 5)/(t - 5) = 10, what is the value of t ?A) 45 / 11B) 5C) 11/2D) 55/9

love history [14]

The value of t is (D) 55/9.

<h3>What is an equation?</h3>

An equation is a formula in mathematics that expresses the equality of two expressions by connecting them with the equals sign =.
The word equation and its cognates in other languages may have subtly different meanings; for example, in French, an équation is defined as containing one or more variables, whereas in English, an equation is any well-formed formula consisting of two expressions linked by an equals sign.

To find the value of t:

Given -