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3 years ago

I need help!! It’s proving trapezoids theorems

Mathematics

2 answers:

sweet [91]3 years ago

7 0

Because ABCD is an isosceles trapezoid, the angles A and D are congruent.

BA and CD are congruent (given) and AD is congruent to itself (reflexive property).

Then triangles BAD and CDA form a pair of SAS triangles, so they are congruent.

BD and CA are corresponding parts in those triangles, so they are congruent (CPCTC).

kotegsom [21]3 years ago

3 0

Answer:

see picture

Step-by-step explanation:

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If Alice give an interest of 90$ for two years and 9% p.a., find the sum she has borrowed .

hodyreva [135]

Refer the attachment for your answer :)

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2 years ago

An equation is shown.

mr_godi [17]

Answer:

Step 1 should be (14.4+18)...PEMDAS

Step-by-step explanation:

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3 years ago

Mildred bought 2-cent stamps, 4-cent stamps, and 5-cent stamps for $4.35. The number of 2-cent stamps exceeded the number of 5 c

vfiekz [6]

5 cent = 0.05x

2 cent = 0.02(x+50)

4 cent = 0.04(2x-10)

0.05x + 0.02(x+50) + 0.04(2x-10)

0.05x + 0.02x +1 + 0.08x -0.4 = 4.35

0.15x +0.6 = 4.35

0.15x = 3.75

X = 3.75 / 0.15 = 25

25 5 cent stamps ( 25*0.05 = 1.25)

25+50 = 75 2 cent stamps ( 75*0.02 = 1.50)

2*25 =50-10 = 40 4 cent stamps ( 40*0.04 =1.60)

1.25 + 1.50 +1.60 = 4.35

5 cent = 25

2 cent = 75

4 cent = 40

8 0

3 years ago

The table shows the number of candid pictures of students for the yearbook for two consecutive years. Year Number of Photos 2015

Elena-2011 [213]

Answer:

The percentage decrease in the number candid student pictures for the yearbook from 2015 to 2016 is approximately 9.3 percent

Step-by-step explanation:

The given data can be presented as follows

Year ${}$ Number of Photos

2015 ${}$ 236

2016 ${}$ 214

The percentage decrease in the number of candid pictures is give by the following formula

$Percentage \ Decrease = \dfrac{Original \ Value- New \ Value}{Original \ Value} \times 100$

Where;

Original value for the number of pictures = 236

New value for the number of pictures = 214

Substituting the values into the equation for the percentage decrease gives;

$Percentage \ Decrease = \dfrac{236- 214}{236} \times 100 = \dfrac{550}{59} \ percent\approx 9.3 \%$

The percentage decrease is approximately 9.3 percent.

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2 years ago

Stuco wants to start a new project to help with trash removal. They need $15 to buy supplies at the local landfill and they char

LuckyWell [14K]

Answer:

$17,640

Step-by-step explanation:

Stuco wants to start a new project to help with trash removal. They need $15 to buy supplies at the local landfill and they charge 75 per pound. If the Senior Class collects 235 pounds of trash, the cost is going to be $17,640.

235 ⋅ 75 = 17,625

17,625 + 15 = 17,640

Therefore, the answer is $17,640.

3 0

3 years ago