7. Emily and John will be hiking for 42 hours. Hikers should drink at least 2.7 cups of water for every 2 hours of hiking. How many cups of water should Emily and John drink?

Answer:

Step-by-step explanation:

a) y=[tex]x^{2} -4x[/tex]

x=-1 ⇒ y=[tex](-1)^{2} +4=1+4=5[/tex]

x=1    ⇒  y=[tex]1^{2} -4=1-4=-3[/tex]

x=2 ⇒   y=[tex]2^{2} +8=4-8=-4[/tex]

x=4   ⇒  y=[tex]4^{2} -16=16-16=0[/tex]

b) [tex]x^{2} -4x[/tex]=[tex]x^{2} -4x+4-4=(x-2)^{2}-4[/tex]

so the blue one

Answer:

Let n be the number of 25 cent stamps.Then, 28 - n must be the number of 29 cent stamps.Tim paid $7.60 the stamps.

0.25n + 0.29(28 - n) = 7.60

This means that n stamps at 25 cents a piece plus (28 - n) stamps at 29 cents a piece sum to $7.60.Solve for m.

0.25n + 8.12 - 0.29n = 7.60

-0.04n = -0.52

n = 13

So, Tim bought 13 25-cent stamps and 28 - 13 = 15 29-cent stamps

Step-by-step explanation:

hope this helps:)

Answer: 16,21

Step-by-step explanation:

There are two ways you can solve this problem using substitution and elimination.

In this answer, I'm going to be using substitution.

First, you make two equations based on the information given.

The two equations are 0.15x+0.2y=6.6 and X+Y=37.

In the second problem subtract y to move it to the other side to get X=37-y.  

Now that you got x= make a new equation which should be 0.15(37-y)+0.2y=6.6 use distributive property to get 5.55-.15y+0.2y=6.6.

Then, subtract 5.55 by 6.6 to get 1.05 and 0.2y+-.15y to get 0.05 y.

Now you have 0.05y=1.05 divided 0.05 and 1.05 to get 21.

Now plug 21 into the X+Y=37 equation to get X+21=37 subtract 21 from 37 to get X=16.

So X=16 and Y=21, so the answer is 16,21.

Answer:

If a basketball player consistently shoots 80% from the free throw line and she takes 25 free throw shots throughout the course of a game, how many free throws can she be expected to make?

A basketball player makes 75% of the free throws that he attempts. What is the probability, approximated, that he succeeds in half of them in 40 trie

Answer:

Its a trick question

Step-by-step explanation:

Answer:

Lateral surface area = 360 cm²

Step-by-step explanation:

Given:

Dimension of small rectangle = (12 cm by 10 cm)

Find:

Lateral surface area

Computation:

Length =√9² + 12²

Length = √81 + 144

Length = 15 cm

Dimension of big rectangle = (15 cm by 10 cm)

Lateral surface area = Area of small rectangle + Area of big rectangle + Area  of slop rectangle

Lateral surface area = (L1 x B1) + (L x B) + (l x b)

Lateral surface area = (12 x 10) + (15 x 10) + (10)(9)

Lateral surface area = 120 cm² + 150 cm² + 90 cm²

Lateral surface area = 360 cm²

Answer:

s = 47

Step-by-step explanation:

The measure of the exterior angle of a triangle is equal to the sum of the opposite interior angles

s+45 = s+6  + s-8

Combine like terms

s+45 = 2s-2

Subtract s from each side

s+45-s =2s-2-s

45 =s-2

Add 2 to each side

45+2 = s-2+2

47 =s

Answer:

Step-by-step explanation:

I think you mean 3(x+8)², not 3(x+8)2. If you cannot type ², use ^ to mark the exponent: 3(x+8)^2.

3(x+8)² + 8 = 83

3(x+8)² = 75

(x+8)² = 25

x+8 = ±√25

x+8 = ±5

x = -8 ± 5 = -3, -13

Answer:

Step 2

Step-by-step explanation:

Answer:

yeah you just have to hope you got it correct until they tell you or give you brainliest

Answer:

1. something's missing

2. 120

3. 90

Step-by-step explanation:

Order of operations is: PEMDAS = parentheses, exponents, multiplication, division, addition, subtraction

1. Missing something in this first one

56 ?? 49 x 2

2. 100 + 5 x 4

first multiply:

= 100 + 20

then add:

=120

3. 8 x 12 - 6

first multiply:

= 96 - 6

then subtract:

= 90

Drop the full equation for number 1 in the comments and I'll walk you through it. :)

Answer:

90: D

Step-by-step explanation:

Answer:

The required division is 658 and 342.

Step-by-step explanation:

Let the parts be x and y.

47x + 19y = 1000

let try 2digit number for x and y by inspection 14 and 19 best fit.

47*14 + 18*19 = 1000

658 + 342 = 1000

Answer: 13440 grams

Step-by-step explanation:

Since 1 kg is 1000 g, multiply 0.64 by 1000 to find how many grams are in a kilogram.

0.64x1000

=640 grams

She uses 640 grams each day.

How many grams does he use in 3 weeks?

1 week has 7 days

3 weeks has 21 days

3x7=21

640x21

13440 grams

The necklaces will be sold for $8.75.

All you have to do is devide 201.25 by 23 and you will get your answer.

Answer:

2/19

Step-by-step explanation:

Answer:

2.) 385

Step-by-step explanation:

V=πr2h

3=π·72·7.5

3≈384.8451

rounded=385.

Answer:

Y= -4.5

Step-by-step explanation:

Hope this helps!

Answer:

y = -4.5

Step-by-step explanation:

6(y + 1.5) = -18

6y + 9 = -18

subtract 9 from each side of the equation:

6y = - 27

divide both sides by 6:

y = -4.5

Answer:

5 / 8 = 0.625 is best equivalent.

Answer:

B. (1,2)

Step-by-step explanation:

Answer:

heyhey! your in luck, Im here again <3

Step-by-step explanation:

The coordinates are ( 1,2 ) . In answer, its B. Why? Well the distance in between was 5, and the middle landed right after the line, which landed of the coordinates ( 1,2 ) . Your welcomee!

Answer:

2/3

Step-by-step explanation:

3/4 x 8/9 = 24/36 or 2/3 simplified

Answer:

$317

Step-by-step explanation:

Formula for compound interest is;

A = P(1 + (r/n))^(nt)

For melanie;

P = $3800

r = 2⅜% = 0.02375

n = 12/4 = 3

t = 16 years

Thus;

A = 3800(1 + (0.02375/3))^(3 × 16))

A ≈ $5548

For Sébastien;

P = $3800

r = 2¾% = 0.0275

n = 12

t = 16

Thus;

A = 3800(1 + (0.0275/12))^(12 × 16))

A ≈ 5865

Difference between Sébastien and Melanie's final amount = $5865 - $5548 = $317

Answer:

[tex]\frac{x}{y}[/tex]45 long

Step-by-step explanation:

The total area of both the triangles is 56.25 square units.

When two triangles are similar, the reduced ratio of any two corresponding sides is called the scale factor of the similar triangles.

The space occupied by a flat shape or the surface of an object is called area.

Area = (1/2) × base × height

According to the given question.

We have a two triangles, which are similar to each other.

Let the length of the side DE in triangle DEF be x.

Since, ABC similar to DEF

⇒[tex]\frac{AB}{DE} =\frac{BC}{EF}[/tex]

⇒[tex]\frac{12}{x} =\frac{6}{4.5}[/tex]

⇒[tex]\frac{12(4.5)}{6} = x[/tex]

⇒[tex]2(4.5)=x[/tex]

⇒ [tex]x = 9[/tex]

Now, area of triangle ABC = [tex]\frac{1}{2}(6)(12)=36 square units[/tex]

Area of triangle DEF = [tex]\frac{1}{2} (9)(4.5)= 20.25square units[/tex]

Therefore,

The total area for both the triangles

= 36 + 20.25

= 56.25 square units

Thus option B is correct.

Find out more information about area of similar triangles here:

https://brainly.com/question/16394875

#SPJ2

Answer:

The number cubes needed when we have three cubes along each edge is 27 cubes

Step-by-step explanation:

The given parameters for the building of a cubic prism are;

The number of cubes used to build the 2 by 2 cube = 8 cubes

Let 'x' represent the length of each cube, we have;

The volume of a 2 by 2 cube = 2·x × 2·x × 2·x = 8·x³

Where x³ represents the volume of each cube

When we have three cubes along each edge, the total volume, becomes;

V = 3·x × 3·x × 3·x = 27·x³

The number cubes needed when we have three cubes along each edge, n = (The total volume of the cubes)/(The volume of each cube)

∴ The number cubes needed when we have three cubes along each edge, n = 27·x³/(x³/cube) = 27 cubes.

Answer:

Step-by-step explanation:

Answer:

1.) 8x+28      2.) 2(4x+14)

Step-by-step explanation:

simplify it by multiplying the 4

or

after simplifying you could divide by 2

option 1 is the best answer

Answer:

The slope is y=0.59x so 0.59

The y intercept is 0

Answer:

careful of taking pictures of problems. I got warnings and questions deleted when I had the picture of my question since it was violating the code of brainly since it was a different cite. -_-

Step-by-step explanation:

Answer:

2.57 and 11/3 and 3.14

Step-by-step explanation:

Answer:

Red- 1/4 or 25% chance

Number less than six- 5/8 or 62.5% chance

Answer:

56.5 in^2

Step-by-step explanation:

The volume of a cone is π[tex]r^{2}[/tex]h/3. The radius is d/2=6/2=3

V=(3.14 x [tex]3^{2}[/tex] x 6)/3

 =(3.14 x 54)/3

 =169.56/3

 =56.52