1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
alina1380 [7]
3 years ago
10

Alexandra Ran 2 7/10 miles on Monday. She ran twice as far on Tuesday. How far did Alexandra run in all on those days?

Mathematics
1 answer:
ser-zykov [4K]3 years ago
4 0
8 1/10 miles in total and nice pika :)
You might be interested in
Help me with this question
natta225 [31]
I can’t read that so sorry I wish I could help you but I can’t bc I can’t read it
8 0
2 years ago
I need help finding this answer because I am pretty sure it’s C but I don’t know
malfutka [58]

Answer: A) -9

Step-by-step explanation:

If x = -2

Then 3^{x} = 3^{-2}

So, it is -9

5 0
3 years ago
The perimeter of a rectangle is 16.6km, and its area is 13.42km2. Find its length and width. length : km width : km
Otrada [13]

Answer:

l=5.12 & w=2.62

Step by step explanation:

A=l×w

13.42=lw

w=13.42/l

p = 2(l + w) \\ 16.6 = 2(l +  \frac{13.42}{l} ) \\ 16.6 = 2( \frac{ {l}^{2}  + 13.42}{l}) \\ 16.6 = 2(l + 13.42) \\ 16.6 = 2l + 26.84 \\ 2l = 26.84 - 16.6 \\ 2l = 10.24 \\ l =  \frac{10.24}{2}  \\ l = 5.12km

Since you have found the value of the length you can find the value.of the width.

w =  \frac{13.42}{l}  \\ w =  \frac{13.42}{5.12}  \\ w = 2.62km

5 0
3 years ago
At a certain time of the day, a tree that is x meters tall casts a shadow that is x-49 meters long. If the distance from the top
nikklg [1K]

The height of the tree is 60 meters.

Explanation:

Let the height of the tree be x. The tree casts a shadow of x-49 meters and the distance from the top of the tree to the end of the shadow is x+1 meters.

The sides of the triangle are attached in the image below:

Using pythagoras theorem,

x^{2}+(x-49)^{2}=(x+1)^{2}

Expanding, we get,

2 x^{2}-98 x+2401=x^{2}+2 x+1

2 x^{2}-98 x+2400=x^{2}+2 x

2 x^{2}-100 x+2400=x^{2}

x^{2}-100 x+2400=0

Solving the equation using the quadratic formula x=\frac{-b \pm \sqrt{b^{2}-4 a c}}{2 a}, we get,

x=\frac{-(-100)\pm\sqrt{(-100)^{2}-4 \cdot 1 \cdot 2400}}{2 \cdot 1}

Simplifying, we have,

x=\frac{100\pm\sqrt{10000-9600}}{2}

x=\frac{100\pm\sqrt{400}}{2}

x=\frac{100\pm{20}}{2}

Thus,

x=\frac{100+20}{2} \\x=\frac{120}{2} \\x=60  and  x=\frac{100-20}{2} \\x=\frac{80}{2} \\x=40

where the value x=40 is not possible because substituting the value x=40 in x-49 results in negative solution. Which is not possible.

Hence, the value of x is 60.

Thus, The height of the tree is 60 meters.

7 0
3 years ago
How to find the side of a right triangle
m_a_m_a [10]

Answer:

https://www.mathsisfun.com/algebra/trig-solving-sas-triangles.html

Step-by-step explanation:


7 0
3 years ago
Other questions:
  • PLEASE HELP ME QUICKLY!!!!!!!!!!!!!!!!
    14·2 answers
  • David, a platform diver, dives into the pool during practice. The height of David above the water at any given time, s, can be m
    10·1 answer
  • Determine the value of in, in each of the following cases, where n represents all positive integer values.
    6·1 answer
  • A basketball player made 63 out of 100 attempted free throws.what percent of free throws did the player make
    5·2 answers
  • Find the Circumference and area of the circle with the center C=(-1,2) and a point on the circle A(4,-1). Round to the nearest t
    14·1 answer
  • Answer correctly and I will mark you brainless ❤️
    12·1 answer
  • A bus leaves Islamabad at 11:00 am and reaches Lahore at 3:00 p.m . If the distance bwtween Islamabad to Lahore is 380km , find
    8·1 answer
  • Help! Given that tanθ=-1, what is the value of secθ, for 3π/2<θ<2π?
    5·1 answer
  • Determine the volume of this prism
    7·2 answers
  • 3(x+5y−4)−4x−11+5a+3b−6c+2a−4b+13c
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!