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Vanyuwa [196]
3 years ago
10

Compare using < or > or = -15____-21

Mathematics
1 answer:
Salsk061 [2.6K]3 years ago
5 0
<h3><u><em>Answer:</em></u></h3>

-15 > -21

<h3><u><em>step by step:</em></u></h3>

We know that 15 < 21 then  -15 > -21

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5 more than 3 times a number w
Mila [183]
3 times w+5

3xW+5 ......
5 0
3 years ago
Triangle ABC has AB=5, BC=7, and AC=9. D is on AC with BD=5. Find the length of DC
e-lub [12.9K]

Answer:

DC=\frac{8}{3}\ units

Step-by-step explanation:

The picture of the question in the attached figure

we know that

The triangle ABD is an isosceles triangle

because

AB=BD

The segment BM is a perpendicular bisector segment AD

so

<em>In the right triangle ABM</em>

Applying the Pythagorean Theorem

BM^2=AB^2-AM^2

we have

AB=5\ units\\AM=x\ units

substitute

BM^2=5^2-x^2

BM^2=25-x^2 -----> equation A

<em>In the right triangle BMC</em>

Applying the Pythagorean Theorem

BM^2=BC^2-MC^2

we have

BC=7\ units\\MC=AC-AM=(9-x)\ units

substitute

BM^2=7^2-(9-x)^2

BM^2=49-(81-18x+x^2)  

BM^2=49-81+18x-x^2

BM^2=-x^2+18x-32 ----> equation B

equate equation A and equation B

-x^2+18x-32=25-x^2

solve for x

18x=25+32\\18x=57\\\\x=\frac{57}{18}

Simplify

x=\frac{19}{6}

<em>Find the length of DC</em>

DC=AC-2x

substitute the given values

DC=9-2(\frac{19}{6})

DC=9-\frac{19}{3}\\\\DC=\frac{8}{3}\ units

8 0
3 years ago
Please helpppp meeeee
aniked [119]
Answer: c
explanation:
Its f(x) but flipped and intersects at y = -3
good luck!
5 0
3 years ago
Read 2 more answers
What is 10x and a negative 15 over 10 plus one half
eimsori [14]

Answer:

-29/2

Step-by-step explanation:

3 0
3 years ago
−k−(−8k) Combining like terms im confused!
melisa1 [442]

-k-(-8k)

= -k + 8k (two negatives equal one positive)

= 8k-k (flip it around because of the commutative property)

=7k (basic subtraction)

I really hope that helped :)

5 0
3 years ago
Read 2 more answers
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