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4 years ago

Can someone explain what I am suppose to do please?

Mathematics

1 answer:

finlep [7]4 years ago

3 0

You divide each number by the sscale factor given and total it up and you get the answer

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I need help to fill in the blanks.. please

Murljashka [212]

Answer:

Part a) alternate interior angles theorem

Part b) vertical angles theorem

Part c) AA Similarity theorem

Part d) triangle ABC is similar with triangle EDC

Part e) The length side b is 3 cm

Step-by-step explanation:

Part a) we know that

The Alternate Interior Angles Theorem states that, when two parallel lines are cut by a transversal , the resulting alternate interior angles are congruent. Each pair of these angles are inside the parallel lines, and on opposite sides of the transversal.

In this problem

The transversal is the segment BD and the parallel lines are AB and DE

$m\angle 1=m\angle 4$ ----> by alternate interior angles theorem

Part b) we know that

Vertical Angles Theorem states that vertical angles are congruent. Vertical Angles are the angles opposite each other when two lines cross.

In this problem, the two lines that cross are BD and AE

$m\angle 5=m\angle 6$ ----> by vertical angles theorem

Part c) we know that

The AA Similarity Theorem states: If two angles of one triangle are congruent to two corresponding angles of another triangle, then the triangles are similar

In this problem

triangle ABC is similar with triangle EDC by AA Similarity Theorem

Because

$m\angle 1=m\angle 4$ ----> by alternate interior angles

$m\angle 5=m\angle 6$ ----> by vertical angles

Part d) triangle ABC is similar with triangle EDC by AA Similarity Theorem

see the explanation Part c)

Part e) Find the length of side b

we know that

If two triangles are similar, then the ratio of its corresponding sides is proportional and its corresponding angles are congruent

we have that

triangle ABC is similar with triangle EDC

Applying proportion

$\frac{BC}{DC}=\frac{AC}{EC}$

substitute the given values

$\frac{2}{DC}=\frac{5}{7.5}$

solve for DC

$DC=2(7.5)/5=3\ cm$

therefore

The length side b is 3 cm

6 0

3 years ago

Could someone pls help me!

Angelina_Jolie [31]

Answer:

It will be complete in 20 miles and it will be 57 miles when it is complete.

Step-by-step explanation:

37 is one less mile than 38 and 38 is two thirds of 57, so the highway is 57 miles when completed. 57 subtracted by 37 equals 20

7 0

3 years ago

Read 2 more answers

The swe area of the cereal box 5 30 cm 20 cm

Nikitich [7]

Is there a picture of the cereal box?

4 0

3 years ago

Respuesta de estas ecuaciones (Los "{ }" y "[ ]" son "( )" simplemente estan asi para poder diferenciarlos A) [-3+(6-8)]-[40+(5.

Ivahew [28]

Answer:

$A)\ [-3+ (6-8)] - [40+ (5.3-7) +20.2] = -63.5$

$B)\ -4 + [- 2.6-1 - (- 3.4)] + (- 5) * (- 3) + (- 10) =0.8$

$C)\ -22 * \{- 5+ [8.3- (3.6-9)]\} - (- 2) * (3) =-185.4$

$D)\ -9 - (- 2 + 5) * [- 3 + (- 5) - (+ 2) +1] =18$

$E)\ 40 * \{- 12 * [4 + (- 6) * (- 5) -15.3 + 12]\} - 2 =-14738$

$F) -21 * \{- [- 6 * (7-3)] - (7.6-8.3)\} - 89 =-607.7$

Step-by-step explanation:

$A)\ [-3+ (6-8)] - [40+ (5.3-7) +20.2] =$

Resuelve todas las expresiones en el paréntesis interior

$[-3-2] - [40 -1.7 + 20.2]$

Resuelve cada paréntesis

$-5 - 58.5$

$-63.5$

$B)\ -4 + [- 2.6-1 - (- 3.4)] + (- 5) * (- 3) + (- 10) =$

Resuelve todas las expresiones en el paréntesis interior

$-4 + [-0.2] + (- 5) * (- 3) + (- 10)$

Resuelve todas las multiplicaciones y paréntesis.

$-4 -0.2 + 15-10$

$=0.8$

$C)\ -22 * \{- 5+ [8.3- (3.6-9)]\} - (- 2) * (3) =$

Resuelve todas las expresiones en el paréntesis interior

$-22 * \{- 5+ [8.3 + 5.4]\} - (- 2). (3)$

Resuelve todas las multiplicaciones y paréntesis.

$-22 * 8.7 +6$

$-191.4 + 6$

$=-185.4$

$D)\ -9 - (- 2 + 5) * [- 3 + (- 5) - (+ 2) +1] =$

Resuelve todas las expresiones entre paréntesis interiores

$-9 - 3 * [- 3 - 5 - 2 +1]$

$-9-3 * -9$

$-9 + 27$

$= 18$

$E)\ 40 * \{- 12 * [4 + (- 6) * (- 5) -15.3 + 12]\} - 2 =$

Resuelve todas las expresiones entre paréntesis interiores

$40 * \{- 12 * [4 - 6 * - 5-15,3 + 12]\} - 2$

Multiplicar -6 por -5

$40 * \{- 12 * [4 + 30-15.3 + 12]\} - 2$

Resuelve todas las expresiones en el paréntesis interior

$40 *\{- 12 * 30.7\} - 2$

Quitar todos los paréntesis

$40 * -368.4 - 2$

$-14736 - 2 \\$

$=-14738$

$F) -21 * \{- [- 6 * (7-3)] - (7.6-8.3)\} - 89 =$

Resuelve todas las expresiones entre paréntesis interiores

$-21 * \{- [- 6 * 4] +0.7\} - 89$

Multiplicar -6 por 4

$-21 * \{24 +0.7\} - 89$

Quitar todos los corchetes

$-21 * 24.7 - 89$

$-518.7 - 89$

$=-607.7$

7 0

3 years ago

Encuentra el cociente???

-Dominant- [34]

For this case we must find the quotient of the following expression:

$\frac {18x ^ 6 * y ^ 2} {9xy}$

We can rewrite the expression as:

$\frac {2x ^ 6 * y ^ 2} {x * y} =$

By definition of division of powers of the same base, we place the same base and subtract the exponents:

$\frac {a ^ m} {a ^ n} = a ^ {m-n}$

So:

$2x^ {6-1} * y ^ {2-1}\\2 * x ^ 5 * y$

Answer:

$2x ^ 5 * y$

7 0

4 years ago