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Tema [17]
3 years ago
8

HELP PLEASE ASAP ALMOST FAILING!!!

Mathematics
1 answer:
Westkost [7]3 years ago
5 0

Remark

Whatever you did not use to obtain congruency, you can use to get congruent by CPCTC. They have to look like they are about the same size. Later on you will be taught not to rely on diagrams other than as guides.

So for sure AB and CB are not used as part of the congruency so the look like they should be congruent and that is your answer.

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Help with 21 would be much appreciated.
umka2103 [35]

Answer:

\large\boxed{x=2\sqrt{21}\ and\ y=4\sqrt3}

Step-by-step explanation:

Look at the picture.

ΔADC and ΔCDB are similar. Therefore the sides are in proportion:

\dfrac{AD}{CD}=\dfrac{CD}{DB}

We have

AD=14-8=6\\CD=y\\DB=8

Substitute:

\dfrac{6}{y}=\dfrac{y}{8}         <em>cross multiply</em>

y^2=(6)(8)

y^2=48\to y=\sqrt{48}\\\\y=\sqrt{16\cdot3}\\\\y=\sqrt{16}\ cdot\sqrt3\\\\\boxed{y=4\sqrt3}

For x use the Pythagorean theorem:

x^2=6^2+(4\sqrt3)^2\\\\x^2=36+48\\\\x^2=84\to x=\sqrt{84}\\\\x=\sqrt{4\cdot21}\\\\x=\sqrt4\cdot\sqrt{21}\\\\\boxed{x=2\sqrt{21}}

3 0
3 years ago
What are the partial products for 43 x 17
Lelechka [254]
The partial products would be 10 multiply 40, 10 multiply 3, 7 multiply 40, and 7 multiply 3.
4 0
3 years ago
Which mathematical symbol would best fill in the blank to compare the two real numbers 2__1.8
katrin [286]
Hello.

The mathematical symbol that would best fill the blank to compare both numbers is '>', which indicates a number is greater than the other.

Hope I helped.
6 0
3 years ago
Read 2 more answers
Help me I'm too tired to think and this is easy.
grandymaker [24]

Answer:

equal to

Step-by-step explanation:

two negatives equals positive

8 0
3 years ago
Read 2 more answers
A rectangular prism has the dimensions 8 feet by 3 feet by 5 feet. What is the surface area of the prism?
raketka [301]

Answer:

A=158

Step-by-step explanation: SA = 2 × l × w  +  2 × l × h  +  2 × w × h

8 0
3 years ago
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