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Virty [35]
4 years ago
8

Solve for, will give brainliest!

Mathematics
1 answer:
Savatey [412]4 years ago
3 0
X=1.5388..... I dont know what to round to
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A biologist who has been studying herd movements in elephants just finished spending
Amanda [17]
We have been given that the speed of elephants is 5km/h east and his speed is 41km/h west.
We have to find after how long will he be 13km from the herd.
Since the biologist is going to the west and the elephants towards east, their relative speed will be calculated by adding their respective speeds.
So final their relative speed will be:
= 5 km/h + 41 km/h
= 46 km/h
Now we want their distance to be 13 km and we have calculated relative speed as 46 km/h.
So using formula :
Speed = Distance / Time,
We calculate time as :
= Distance / Speed
= 13 / 46
= 0.28 hours
= 16.8 minutes.
So after 16.8 minutes, biologist will be 13 km away from the herd.
7 0
3 years ago
A jewelry store marks up the price of its jewelry up 50%. What will be the selling price of an item that the store purchased for
snow_tiger [21]

Answer: $142.5

Step-by-step explanation: If the price is being marked up by 50%, you take 50% or half of the original price of $95, which is 47.5, and add it to your original price.

95 + 47.5 = 142.5

3 0
3 years ago
If any of u guys know this can u help me I am stuck on this problem????
Phantasy [73]

Answer:

16/21

Step-by-step explanation: 4 x 3 = 12, 3 x 7 = 21, 13/3 - 25/7 raise to the first common denominator, 91/21 - 75/21 = 16/21

7 0
3 years ago
Read 2 more answers
HELP! WILL GIVE BRAINLIEST!!! I think it's D please check
kow [346]

Answer:

(x + 5) (x^2 -3)

Step-by-step explanation:

x^{3} +5x^{2} - 3x - 15

Do the grouping:

x^{3} +5x^{2} - 3x - 15 = (x^{3} +5x^{2}) + (-3x - 15)

Then factor out x^{2} in the first and −3 in the second group.

x^{2}(x+5) - 3(x+5)

Factor out the common term x + 5 by using the distributive property.

Polynomial x^{2}-3 is not factored in since it does not have any rational roots, thus getting the following:

(x+5)(x^{2} -3)

8 0
3 years ago
Read 2 more answers
Cora says he dosen't need to know the y-interce of a line to write its equation,just its slope and some other point on the line.
Soloha48 [4]

Answer:

Yes, Cora is correct.

The equation of line with point  (2,6) and slope of line (-1/3)

is x + 3y - 20 = 0

Step-by-step explanation:

Yes, the equation of a line can be written using a point and a slope of the line equation.

Cora has used the POINT SLOPE FORMULA, to represent the line equation.

In <u>Point Slope formula</u>:

The equation with slope m and points (x0,y0) can be written as:

(y-y0) =m (x-x0)

Here, the point (x0,y0) = (2,6)

and slope m = (-1/3)

So, the equation can be written as:( y - 6) =\frac{-1}{3} (x-2) \\\implies 3( y-6) = (2-x)\\or, 3y - 18 -2 + x = 0\\or, x + 3y - 20 = 0

Hence, the equation of line with point  (2,6) and slope of line (-1/3)

is x + 3y - 20 = 0

4 0
3 years ago
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