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2 years ago

Helpppppp pleaseeeeeeeeee

Mathematics

2 answers:

77julia77 [94]2 years ago

7 0

Answer:

39.9km a day

Step-by-step explanation:

Add up the four kilometers cycled and you should get 159.6km cycled in total. Divide that number by 4 to get 39.9km as a result. So she's wrong.

UNO [17]2 years ago

3 0

Answer:

39.9

Step-by-step explanation:

Because he cycled 4 days and the distances for each days are 32.3 km, 38.7 km, 43.5 km and 45.1 km. The total distance should be,

$Total = 32.3 km + 38.7km + 43.4km + 45.1km\\\\= 159.6km\\$

Now the average should be,

$Avg = \frac{159.6 km}{4}\\= 39.9 km$

This is of course less than 40km and you can told her that she's wrong. And, this is true only when the data of each day is accurate and not rounded so that actual total is relatively more than the one I have calculated.

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Sauron [17]

Step-by-step explanation:

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4 0

3 years ago

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The sum of three consecutive numbers (numbers in order one after another is 84. What are the three numbers? ________+ ________ +

Serggg [28]

Answer:

The answer is 27, 28, 29.

3 0

2 years ago

I need help with this one I’m not sure if I got it right

weqwewe [10]

Answer:

144 feet

Step-by-step explanation:

Since this is a quadratic equation, we simply need to find the vertex in order to determine the maximum height!

To solve the equation, follow these steps!:

$0 = 16t^2+96t\\\\\frac{-b}{2a} =x\\\\\frac{-96}{2(-16)}=3=x$

Now we insert x back into the equation...

$= -16(3)^2+96(3)\\ = -16(9)+288\\ =-144+288\\=144$

7 0

2 years ago

ANSWER FAST ILL GIVE BRAINLIEST!!

Dominik [7]

Given:

A square base pyramid whose base length is 10 in. and height of triangular surface is 4 in.

To find:

The surface area of the pyramid to the nearest whole number.

Solution:

A square base pyramid contains square base with edge 10 in. and 4 congruent triangles with base 10 in. and height 4 in.

Area of a square is

$A_1=(edge)^2$

$A_1=(10)^2$

$A_1=100$

So, area of square base is 100 sq. in.

Area of a triangle is

$A_2=\dfrac{1}{2}\times base\times height$

$A_2=\dfrac{1}{2}\times 10\times 4$

$A_2=20$

So, area of each triangular surface is 20 sq. in.

Now, the total surface area of the pyramid is

Total area = Area of square base + Area of 4 congruent triangles.

$A=A_1+4\times A_2$

$A=100+4\times 20$

$A=100+80$

$A=180$

Therefore, the area of the pyramid is 180 sq. in.

5 0

3 years ago

x and y are numbers between 50 and 100. Both x and y have the same digit but in a different order. the two numbers add up to 187

Ymorist [56]

By solving a system of equations, we see that:

x = 89 and y = 98.

<h3>How to find the two numbers?</h3>

First, we can write:

x = a*10 + b

y = b*10 + c

Where a, b, and c are single digit numbers. You can see that b is on both numbers because we know that the numbers share a digit, but on different order.

We also know that:

x + y = 187

a + b + b + c = 34

I we rewrite the first equation, we get:

(a*10 + b) + (b*10 + c) = 187

10a + 11b + c = 187

Then we have two equations:

a + 2b + c = 34

10a + 11b + c = 187

In both equations we can isolate c:

34 -2b -a = c

10a + 11b - 187 = c

Now we have:

-a - 2b + 34 = -10a - 11b + 187

Solving that, we get:

9a + 9b = 153

a + b = 153/9 = 17

Then a and b add up to 17, we can take:

a = 8

b = 9

And:

c = -a - 2b + 34 = -8 - 9 - 9 + 34 = 8

Then the numbers are:

x = 89

y = 98

If you want to learn more about system of equations:

brainly.com/question/13729904

#SPJ1

6 0

2 years ago