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svlad2 [7]
3 years ago
10

Mr. Sanchez bought some book s at the book sale, including 15 paperbacks books. 75% of all the books he bought were paperbacks.

How many books did Mr. Sanchez buy in all
Mathematics
1 answer:
goblinko [34]3 years ago
4 0

Answer:

Sanchez bought 20 books.

Step-by-step explanation:

Represent the total number of books purchased by t.  Then:

0.75n = 15.  Thus, n = 20.

Sanchez bought 20 books.

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In the figure CD is the perpendicular bisector of AB . If the length of AC is 2x and the length of BC is 3x - 5 . The value of x
Dennis_Churaev [7]

Answer

Find out the value of x .

To proof

SAS congurence property

In this property two sides and one angle of the two triangles are equal.

in the Δ ADC and ΔBDC

(1) CD = CD (common side of both the triangle)

(2) ∠CDA = ∠ CDB = 90 °

( ∠CDA +∠ CDB = 180 ° (Linear pair)

as given in the diagram

∠CDA  = 90°

∠ CDB = 180 ° - 90°

∠ CDB = 90°)

(3) AD = DB (as shown in the diagram)

Δ ADC ≅ ΔBDC

by using the SAS congurence property .

AC = BC

(Corresponding sides of the congurent triangle)

As given

the length of AC is 2x and the length of BC is 3x - 5 .

2x = 3x - 5

3x -2x =5

x = 5

The value of x is 5 .

Hence proved


7 0
3 years ago
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David had a coupon for the grocery store. He graphed on the x-axis what his total bill would be if he didn’t use the coupon and
vladimir2022 [97]

Answer:

68$ Is your answer

Step-by-step explanation:

Hope this helps

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Assume that there are two pairs of congruent triangles in the diagram
pychu [463]
False Happy Thanksgiving :)
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Manny can paint the office​ by himself in 5 hours. Dave can do the same job in 8 hours. How long will it take them to do it work
Alex Ar [27]

Answer:

3 hrs 4.6 mins

Step-by-step explanation:

1/5 + 1/8 = 1/x

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3 0
2 years ago
Help me please . I am stuck
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Answer: n⁴+10n²x+25x²

Step-by-step explanation:

I don;t know how I can use the binomial squares pattern on Brainly, but I can definitely guide you through the problem.

(n²+5x)²                           [rewrite this from the squared]

(n²+5x)(n²+5x)                [use FOIL to expand]

n⁴+5n²x+5n²x+25x²       [combine like terms]

n⁴+10n²x+25x²

7 0
4 years ago
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