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kakasveta [241]
3 years ago
6

Help me pleaseI want the step by step explanation!!​

Mathematics
2 answers:
Andreyy893 years ago
6 0

Answer:

The length of AB is 4.12cm and AD is 9.93cm

Step-by-step explanation:

Using the formula, a²=b²+c²-2(b)(c)cosA to find the length :

cos ∠ACB = 0.6

∠ACB = 53.1° (1d.p)

c² = 5² + 4² - 2(5)(4)cos(53.1)

= 16.98 cm

c =√16.98

= 4.12 cm

AB = 4.12 cm

∠ACD = 180° - ∠ACB

= 180° - 53.1°

= 126.9°

c² = 7² + 4² - 2(7)(4)cos(126.9)

= 98.62 cm

c = √98.62

= 9.93 cm

AD = 9.93cm

DiKsa [7]3 years ago
4 0

Answer: AB=√17, AD=√98,6

Step-by-step explanation:

AB²=BC²+AC²-2*BC*AC*cosACB

AB²=5²+4²-2*5*4*0,6=25+16-24=17

AB=√17

AD²=AC²+CD²-2*AC*CD*cosACD

cosACD=cos(180°-ACB)=-cosACB

AD²=4²+7²-2*4*7*(-0,6)=16+49+33,6=98,6

AD=√98,6

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mrs_skeptik [129]

Answer:

16.75

Step-by-step explanation:

7.5+9.25=16.75

Line up the digits and use traditional algorithm.

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3 years ago
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Coach pug will train your dog for a membership fee of 45 dollar and a session fee of 20 dollars. Dr.Doberman will train your dog
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Answer:

Coach pug charges $45 only one time, and an additional of $20 per session.

So if you take x sessions, the total cost will be:

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We need to see the value of x such that:

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3 0
3 years ago
Sorry can some one help me on this I have been trying
alukav5142 [94]
The answer is 192 because the middle part is equal to 168 then you add 12 two time for the two side in the right and left so it equals to 192
3 0
3 years ago
Plz answer!! only if you are correct. don’t answer just for points :)
Ann [662]

Answer

Step-by-step explanation:

Both 1 and 2 equel up to 90 degrees

so to find x for 1 and 2 you would simplify the equations

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and

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simplify them and you wil get the answers you want

another way to do it is combining the two and solve.

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3 years ago
How Many Inches Are In 3yd 2ft ?
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