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3 years ago

Ayo how do I find the unknown

Mathematics

2 answers:

Sergio039 [100]3 years ago

4 0

Answer:

x = 13

Step-by-step explanation:

Since AB = AC , then Δ ABC is isosceles

So the base angles are congruent , both 2x + 15

The sum of the 3 angles = 180° , then

2x + 15 + 2x + 15 + 98 = 180

4x + 128 = 180 ( subtract 128 from both sides )

4x = 52 ( divide both sides by 4 )

x = 13

galina1969 [7]3 years ago

3 0

as, AC = AB so, angle C = angle B 

so,. value of Angle b = 2x + 15° as well,

hope this answer helps you dear...and may u have a great day ahead!

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ahrayia [7]

By definition, the area of a square is given by:
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Substituting
90 = L ^ 2
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L = root (90)
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7 0

3 years ago

Please help me! What is the inverse of the function g(x)=-3(x+6)? g^-1= Thanks

Sav [38]

Answer:

g^-1(x)= -(x/3) - 6

Step-by-step explanation:

3 0

3 years ago

James needs 70 liters of 50% antifreeze. He has 30% antifreeze and 80% antifreeze avail- able. How many liters of the 30% antifr

Goshia [24]

Answer:

(42,28)

Step-by-step explanation:

set up the problem by converting percentages to decimal

x+y=70

.30x+.80y=50(x+y)

solve for x, so minus y in order to get it x alone. equation should look like this: x=70-y

30(70-y)+80y=50(70-y+y)

solve the equation for y

y=28

plug the value of y into the equation x=70-y

x=70-28

solve for x

x=42

check the solution of (42,28)

42+28=70

30*42+80*28=50(42+28)

simplify the equations

70=70

3500=3500

the ordered pair is a solution

so James needs 42 liters of 30% antifreeze and 28 liters of 80% antifreeze.

(42,28)

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4 years ago

If anyone could pls help!!

Darya [45]

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Step-by-step explanation:

Multiply 64 times 1

64xy^4/2

Then divide 64 by 2

32x1/2y^2

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3 years ago

The area of the base of a prism is 50mm2. The perimeter of the base is 30mm. The height of the prism is 7mm.

Vadim26 [7]

2*50+30*7=100+210=310mm2

6 0

3 years ago