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slamgirl [31]
4 years ago
11

PLEASE HELP ITS URGENT

Mathematics
2 answers:
OlgaM077 [116]4 years ago
8 0

The missing step in this proof is ∠BAC ≅ ∠BDE ⇒ answer D

Step-by-step explanation:

If two triangles are similar by SAS, then their corresponding angles are

equal and the 3rd corresponding sides have constant ratio

In the two triangles ABC and DBE:

  • ∠ABC ≅ ∠DBE
  • \frac{AB}{DB}=\frac{BC}{BE}

Then the two triangles are similar

From similarity:

∠BAC ≅ ∠BDE

∠BCA ≅ ∠BED

∴ The missing step is ∠BAC ≅ ∠BDE

The missing step in this proof is ∠BAC ≅ ∠BDE

Learn more:

You can learn more about triangles in brainly.com/question/3451297

#LearnwithBrainly

dimaraw [331]4 years ago
7 0

Answer:

D

Step-by-step explanation:

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Please help with this question!
IgorC [24]

Answer:

QR = 5

Step-by-step explanation:

Since the parallelograms are similar, then the ratios of corresponding sides are equal, that is

\frac{AB}{PQ} = \frac{BC}{QR}, then

\frac{9}{3} = \frac{15}{QR} ( cross- multiply )

9QR = 45 ( divide both sides by 9 )

QR = 5


8 0
4 years ago
Simplify (8x^2 − 1 + 2x^3) − (7x^3 − 3x^2 + 1).
DENIUS [597]
8x^2-1+2x^3-7x^3+3x^2-1

-5x^3+11x^2-2


8 0
3 years ago
A shirt on sale for 25%off. Sandy paid 7.50 for the shirt. What was the shirts regular price
Gnesinka [82]

£10

Step-by-step explanation:

firstly what you have to do is

since the percentage is decreased

we will say 100 - 25% = 75%

then we say 7.50/75% = 10

So we know that the original price was

£10 pounds

As 10- 25%= 7.5

4 0
2 years ago
Given the picture below, find x and both angles.
Lisa [10]

Answer:

x =42.5

x+8 =50.5

3x+2 =  129.5

Step-by-step explanation:

The two angles shown are supplementary, so they add to 180

x+8   + 3x+2 = 180

Combine like terms

4x+10 = 180

Subtract 10

4x = 170

Divide by 4

x =42.5

x+8 = 42.5+8 = 50.5

3x+2 = 3*42.5 +2 = 127.5 +2 = 129.5

4 0
3 years ago
Read 2 more answers
Verify a - (- b) = a + b for the following values of a and b.
bekas [8.4K]

23 - (-14) = 23 + 14 = <em><u>37</u></em>

128 - (-105) = 128 + 105 = <em><u>233</u></em>

5 0
4 years ago
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