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2 years ago

Jeff is 18 years older than Joe, and Jeff is also 2 1/2 times as old as Joe. How old is Joe?

Mathematics

1 answer:

Yuri [45]2 years ago

6 0

7 years

First of all, half of 18 is 9, and if you divide 18 by 2.5, it results in 7.2. I hope this helps!

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In ΔJKL, l = 860 inches, j = 920 inches and ∠K=126°. Find ∠L, to the nearest degree.

fomenos

Answer:

Step-by-step explanation:

JKL= ABC, jkl=abc

1.) use law of sines to find k.

$c^{2} =a^{2} +b^{2} -2abCosC$

$c=\sqrt{920^{2} +860^{2} -2(920)(860)cos(126) } = 1586.225515$

2.) use law of cosines to find L

$\frac{a}{sinA} =\frac{b}{sinB} =\frac{c}{sinC}$

plug in for b and c: $\frac{860}{sinB} =\frac{1586.225515}{sin126}$

cross multiply: $\frac{1586.23sinB}{1586.23} =\frac{860sin126}{1586.23}$

$sinB= 0.4386227612\\B=sin^-1(0.4386227612)= 26.01604086\\$

L=26

5 0

3 years ago

Giselle pays $210 in advance on her account at the athletic club. Each time she uses the club, $15 is deducted from the account.

Contact [7]

Im not sure but im really pretty ure it is a

8 0

3 years ago

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If f(x) = x2 + 3x - 4, find f(4).

Nat2105 [25]

Answer:

f(4) = 24

Step-by-step explanation:

Plug in 4 for x in the equation:

f(x) = x² + 3x - 4

f(4) = (4)² + 3(4) - 4

Remember to follow PEMDAS. PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction

and is the order of operation.

First, solve the power:

(4)² = 4 * 4 = 16

Next, multiply 3 with 4:

3 * 4 = 12

Next, combine the terms:

f(4) = 16 + 12 - 4

f(4) = (16 + 12) - 4

f(4) = 28 - 4

f(4) = 24

f(4) = 24 is your answer.

8 0

2 years ago

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What is the sum of –18 and 12?<br> A. –6<br> B. –12<br> C. 12<br> D. 6

PolarNik [594]

Answer:

A: -6

Step-by-step explanation:

Flip around the question

what is 12 - 18

If you count the numbers in between 12 and 18

You get 6

So now just make the answer negative

6 0

2 years ago

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Suppose that an object starts at point A and travels in an arc to point B. The trajectory of the projectile is defined by what t

snow_tiger [21]

Answer:Length and angle measure

Step-by-step explanation:

The length measure is the distance along the curve (arc) and the angle measure is the angle that the arc makes with the center of the circle.

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3 years ago

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