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2 years ago

Help me!! please don't answer if you don't know so other people who know can ^^

Mathematics

1 answer:

fenix001 [56]2 years ago

4 0

Answer:

After 12.2 miles

Step-by-step explanation:

You can check this by graphing y = 0.85+16.75 and y = 0.40 + 22.25 and looking for the solution (the point where they intersect).

You can also use the elimination or substitution method.

You might be interested in

How can you use mental math to determine if a ratio is simplified?

attashe74 [19]

This is a very simple question; don't be intimidated. Just see if you can divide both sides of the ratio by the same number and still result in a whole number on both sides. If not, then the ratio is already simplified. It is easy to figure this out by seeing if one or more of the numbers are prime numbers.
Example: 5:10 can be simplified further because both numbers are divisible by 5. 5/5 and 10/5 result in 1 and 2. Therefore, 5:10 can be simplified to be 1:2. However, a number like 9/11 cannot be simplified further, because 11 is a prime number.
Hope this helped you!

3 0

3 years ago

the area of a triangle is 24 square centimeters. If the base of this triangle is 8 centimeters , find the number of centimeters

wlad13 [49]

Answer:

6 cm

Step-by-step explanation:

Area = ½ × b × h

24 = ½ × 8 × h

24 = 4 × h

24/4 = h

6 = h

5 0

2 years ago

Consider the parabola r(t)equalsleft angle at squared plus 1 comma t right angle, for minusinfinityless thantless thaninfinity

kodGreya [7K]

Given:- $r(t)=< at^2+1,t>$ ; $-\infty < t< \infty$ , where a is any positive real number.

Consider the helix parabolic equation :

$r(t)=< at^2+1,t>$

now, take the derivatives we get;

$r{}'(t)=$

As, we know that two vectors are orthogonal if their dot product is zero.

Here, $r(t) and r{}'(t)$ are orthogonal i.e, $r\cdot r{}'=0$

Therefore, we have ,

$< at^2+1,t>\cdot < 2at,1>=0$

$< at^2+1,t>\cdot < 2at,1>=$

$=2a^2t^3+2at+t$

$2a^2t^3+2at+t=0$

take t common in above equation we get,

$t\cdot \left (2a^2t^2+2a+1\right )=0$

⇒ $t=0$ or $2a^2t^2+2a+1=0$

To find the solution for t;

take $2a^2t^2+2a+1=0$

The number $D = b^2 -4ac$ determined from the coefficients of the equation $ax^2 + bx + c = 0.$

The determinant $D=0-4(2a^2)(2a+1)$ $=-8a^2\cdot(2a+1)$

Since, for any positive value of a determinant is negative.

Therefore, there is no solution.

The only solution, we have t=0.

Hence, we have only one points on the parabola $r(t)=< at^2+1,t>$ i.e <1,0>

6 0

3 years ago

X=y-7. <br> X+8y=2<br> Hellplpp helllpppp! Plz!

Luden [163]

X= -5/7
y= 44/7

Hope this helps!!

6 0

2 years ago

A doctor has invented a relaxation method that he

likoan [24]

Answer:

Exam score

Step-by-step explanation:

The response variable also known as the d pendent variable, is simply the variable we intend to measure based in a set of variables (independent variables or explanatory variables) which might cause it to change. For instance, the scenario above aims to look into how a certain relaxation method will affect the exam score, here, the variable we intend to measure is the response variable which is exam score. The exam score is affected by the impact the relaxation method has on the student, hence, the relaxation method is the independent or explanatory variable.

4 0

2 years ago