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3 years ago

X= 25 50 100 Look at attachment

Mathematics

2 answers:

Nat2105 [25]3 years ago

7 0

Answer:

I pretty sure the answer is 100 because the 50 or whatever number is there will always be half of what x is. Hope I'm right on this lol.

Step-by-step explanation:

nydimaria [60]3 years ago

4 0

Answer:

Step-by-step explanation:

x=a)50 so that would

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Ms. Zander is saving up for a new sweater that costs $75. She has already saved $25 and will save $

Leya [2.2K]

Answer:

Step-by-step explanation:

she need to make $50 more you did not put how much shes making a week if she makes $10 it will be five more weeks if she makes $5 it will be 10 more weeks

3 0

3 years ago

What is the correct answer for this question ?

maks197457 [2]

Answer:

$b)\ 61m$

Step-by-step explanation:

The given triangle is a right triangle. This means that one can use right-angle trigonometry to solve the triangle. The right angle trigonometric ratios are a set of ratios that relate the sides and angles of a triangle. These ratios are as follows,

$sin(\theta)=\frac{opposite}{hypotenuse}\\\\cos(\theta)=\frac{adjacent}{hypotenuse}\\\\tan(\theta)=\frac{opposite}{adjacent}$

Bear in mind, the names (opposite) and (adjacent) change depending on the angle of reference. However, the side (hypotenuse) refers to the side opposite the right angle, this side doesn't change depending on the reference angle.

In this problem, one is given the measure of an angle, and the measure of the hypotenuse, the problem asks one to solve for the side opposite the given angle measure. It would make the most logical sense to use the ratio of sine (sin) to do this.

$sin(\theta)=\frac{opposite}{hypotenuse}$

Substitute,

$sin(56)=\frac{h}{73}$

Inverse operations,

$sin(56)=\frac{h}{73}$

$73(sin(56))=h$

$60.519\approx h$

3 0

3 years ago

Find the area of the parallelogram.

bija089 [108]

Answer:

170 cm2

Step-by-step explanation:

Area of Parallelogram = Base x Altitude

Base = 10

Altitude = 17

10 x 17 = 170

Answer = 170 cm2

3 0

3 years ago

Six more than twice a number is 20

4vir4ik [10]

Answer:

Step-by-step explanation:

7x2=14

14+6=20

5 0

3 years ago

An old bone contains 80% of its original carbon-14. Use the half-life model to find the age of the bone

swat32

Answer:

This is an exponential decay problem. These problems are of the form:

y = c * ekt

y = amount of substance left

c = original amount of substance (Here, set this to 100%, or 1.)

e = exponential constant (~2.718)

k = rate of decay constant (We need to figure this out.)

t = time, in years (When t = 0, y = 1 (all of the carbon-14). When t = 5730, y = 0.5 (one half-life has passed). When t = the answer we're trying to find, y = 0.98 (98% of the carbon-14).)

First, we must find the value of k, the rate of decay constant. We know that after 5730 years (t = 5730), one-half of the carbon-14 will remain (y = 0.5).

y = c * ekt

0.5 = 1 * ek * 5730

0.5 = e5730k

To get rid of the e, take the natural logarithm (ln) of both sides:

ln(0.5) = ln(e5730k)

ln(0.5) = 5730k

ln(0.5)/5730 = k

ln(0.5) is a negative number, so our rate of decay constant will be negative. This is a little "sanity check", because radioactive decay means the amount of substance goes down over time. If you get a positive value of k, then you made a mistake somewhere.

Now that we have the rate of decay constant, we can find the value of t (in years) that will yield 98% of the carbon-14 remaining.

y = c * ekt

0.98 = 1 * e[ln(0.5)/5730]t

0.98 = e[ln(0.5)/5730]t

To get rid of the e, take the natural logarithm (ln) of both sides:

ln(0.98) = ln(e[ln(0.5)/5730]t)

ln(0.98) = [ln(0.5)/5730]t

ln(0.98) = ln(0.5)t / 5730

Solve for t:

5730 * ln(0.98) = ln(0.5)t

5730 * ln(0.98) / ln(0.5) = t

Put that into your calculator, to get t ~ 167 years. Both ln(0.98) and ln(0.5) are negative, so the negatives will cancel out to yield a positive number (another "sanity check").

Step-by-step explanation:

7 0

3 years ago