Delaney wants to start saving money to buy a 3-D printer. If she needs to save at least $300.00 to pay for it and has decided to save $15.00 per week from doing chores around the house. Which inequality can be used to find how many weeks will it be before she can purchase the 3-D printer?


15x\geq 30015x≥300


\frac{x}{300} \geq 15
300
x
​
≥15


15x \leq 30015x≤300


\frac{x}{300} \leq 15
300
x
​
≤15

Answer:

At least 75% of these commuting times are between 30 and 110 minutes

Step-by-step explanation:

Chebyshev Theorem

The Chebyshev Theorem can also be applied to non-normal distribution. It states that:

At least 75% of the measures are within 2 standard deviations of the mean.

At least 89% of the measures are within 3 standard deviations of the mean.

An in general terms, the percentage of measures within k standard deviations of the mean is given by [tex]100(1 - \frac{1}{k^{2}})[/tex].

In this question:

Mean of 70 minutes, standard deviation of 20 minutes.

Since nothing is known about the distribution, we use Chebyshev's Theorem.

What percentage of these commuting times are between 30 and 110 minutes

30 = 70 - 2*20

110 = 70 + 2*20

THis means that 30 and 110 minutes is within 2 standard deviations of the mean, which means that at least 75% of these commuting times are between 30 and 110 minutes

Answer:

The answer is 44.66

Step-by-step explanation:

Multiply 58 by 0.23. This will give you 13.34. Next, you subtract this from 58 to get your original price.

Answer:

m<1 = 90°

m<2 = 36°

Step-by-step explanation:

✔️m<2 + 54° = 90° (complementary angles)

m<2 = 90° - 54° (subtraction property of equality)

m<2 = 36°

✔️m<1 = m<2 + 54° (supplementary angles)

m<1 = 36° + 54°

m<1 = 90°

Answer: x=−3 or x=13

Step-by-step explanation:

Step 1: Subtract 39 from both sides.

x2−10x−39=39−39

x2−10x−39=0

Step 2: Factor left side of equation.

(x+3)(x−13)=0

Step 3: Set factors equal to 0.

x+3=0 or x−13=0

x=−3 or x=13

Answer:

The answer is 0.032026144

Step-by-step explanation:

Hoped This helped!

Answer:

0.032

Step-by-step explanation:

So we just go in order:

49 ÷ 34 = 1.44 (simplified)

1.44 ÷ 45 = 0.032 (simplified)

So 49 ÷ 34 ÷ 45 = 0.032

hope this helps:)

Answer: I think its $6

Step-by-step explanation: Because, if she spent a total of $11, and we know that she spent $5, you would subtract the 11 and the 5 to get 6. Hope this helps!

Answer:

No, he doesn't have enough

Step-by-step explanation:

In eights, three quarters of a bottle is equal to 6/8.

Since 5/8 is smaller than 6/8, Craig won't have enough glue.

So, the answer is no.

Answer:

NO

Step-by-step explanation:

3/4 converted to eighths is 6/8. and 6/8 is greater than 5/8

Answer:

answer B is correct of this question

Answer:I believe the answer is C my dude

Step-by-step explanation:

Answer:

The spacecraft would weigh 500 kilograms on Titan.

Step-by-step explanation:

An object that weighs 105 pounds on Earth would weigh 15 pounds on Titan.

This means that the weighs on Titan are 105/15 = 7 times less than the weighs on Earth.

How much would a spacecraft that weighs 3500 kilograms on Earth weigh on Titan?

3500/7 = 500 kilograms

The spacecraft would weigh 500 kilograms on Titan.

Answer:

B,

Step-by-step explanation:

The height of a rectangle is 12 units. The rectangle has an area greater than 25 square units. What are the possible values for the base of the

rectangle, n?

Answer:

[tex]4b + 2m = 2(2b + m)[/tex]

Step-by-step explanation:

Given

[tex]4b + 2m[/tex]

Required

Write an equivalent expression

To do this, we simply write [tex]4b + 2m[/tex] as a product of two factors.

Express 4b as 2 * 2b

[tex]4b + 2m = 2 * 2b + 2m[/tex]

Express 2m as 2 * m

[tex]4b + 2m = 2 * 2b + 2 * m[/tex]

Factor 2 out of the expression:

[tex]4b + 2m = 2 *(2b + m)[/tex]

[tex]4b + 2m = 2(2b + m)[/tex]

Hence:

An equivalent expression is: [tex]2(2b + m)[/tex]

Answer:

15

Step-by-step explanation:

The amount of zeros of a function depends on the highest degree of such function.

Since the highest degree of the given polynomial is 15, hence the function will have 15 zeros

Answer:

x = 29°

Step-by-step explanation:

the Δ on the right has 3 angles whose measures are 30°, 74°, and 76° (you get 76° because it forms a linear pair with an angle that is 104°; you get 74° by adding 30 and 76 and subtracting the sum from 180°.

the Δ on the left has 3 angles whose measures are 45°, 29°, and 106° (you get 106° because it forms a linear pair with an angle that is 74°; you get 29° by adding 45 and 106 and subtracting the sum from 180°.

∡x is a vertical angle with the angle that measures 29° and vertical angles are congruent

Answer:

hopw this helps!!!!!!! so this means that x = 29 :) hoep t∡x is a vertical angle with the angle that measures 29° and vertical angles are congruent

Step-by-step explanation:

Answer: x=40

Step-by-step explanation:

Answer:

X equals 40.

Step-by-step explanation:

since the other side is 120 degrees then the side opposed to it would also be 120. in case you're wondering what the other two sides are, they are both 60.

Answer:

Each eraser costs $0.49

Step-by-step explanation:

If three erasers cost $1.47, and you have to find the value of one eraser, all you have to do is divide $1.47 by three.

1.47 ÷ 3 = 0.49

To prove this, you can multiple 0.49 by three.

0.49 × 3 = 1.47

Therefore, your answer will be $0.49 per eraser.

(Remember to add the money symbol because some hardcore teachers won't accept the answer without it, or will deduct points. The symbol looks like this: $)

Answer:

$0.49

Explanation:

1.47 divided by 3 is 0.49.      

°ω°  

:⊃

°∨°

Answer:

i think it is 2n +18

Step-by-step explanation:

4n - 12 + 6 +2n

so 4n -2n +12 +6 =

2n +18

Answer:

6n-6

Step-by-step explanation:

4(n-3) + 2(3+n)

1. Multiply 4 by n and 4 by 3  and Multiply  2 by 3  and 2 by n

4n-12 + 6+2n

2. Now you add your common numbers

6n -6

Answer:

= 426 1/4 hr.

Step-by-step explanation:

5 1/2 = 5.5 Days in a week

7 3/4 = 7.75 hr. Per Day

Total hours in a week = 5.5 × 7.75 = 42.625 hr in a week

In 10 weeks = 42.625 × 10 = 426.25 hr.

Answer:

d. t-test for means

Step-by-step explanation:

Options are "a. z-test for proportions, b. z-test for means, c. none of the other three answers, d. t-test for means"

Sample size = n = 120

Sample mean = x = 0.8

Sample standard deviation = s = 2

Claim: A particular diet helps loss weight.

Hypothesis test

The null and alternative hypothesis is

H0 : μ = 0

Ha : μ < 0

Now, when population standard deviation is unknown we use t-test otherwise use z-test. So, the kind of hypothesis testing that we use is t-test for means.

Answer:

12%

Step-by-step explanation:

75/84= 0.88 then you do 1-0.88= 0.12. 12%

Answer:

Typist A can type faster

Step-by-step explanation:

Replace the t in w = 50t with any numbers and graph the points you get

You can see that typist A can type 50 words per minute when typist B can only type 40

Answer:

x ≤ -1

Step-by-step explanation:

3( 3x +2 ) - 5 ≤ -x -9

9x + 1 ≤ -x -9

10x ≤ -10

x ≤ -10 / 10

x ≤ -1

Answer:

x≤-1

Step-by-step explanation:

3(3x+2)-5≤-x-9

9x+6-5≤-x-9

9x+1≤-x-9

    -1      -1

9x≤-x-10

+x    +x

10x≤-10

10     10

x≤-1

9514 1404 393

Answer:

  Isabel

Step-by-step explanation:

Gavin saves 28% (given).

Harry saves 1 -3/4 = 1/4 = (1/4)·100% = 25%.

Isabel saves 3/(3+7)·100% = 30%.

Isabel saves the largest fraction of her salary each month.

Answer:

30 cm

Step-by-step explanation:

the area is 1/2 base x height

so (1/2)x10 x 12

Answer:

60 cm squared

Step-by-step explanation:

The 13 cm is just to distract you.

The formula for calculating a triangle is (base x height)/2.

The base is 10 cm, and the height is 12 cm.

Then you plug in the numbers.

(10 x 12)/2=60 cm squared.

Answer and Step-by-step explanation:

We can eliminate answer choices 2 and 4, since the graphs are shading below the line, which means y is less than or less than or equal to the values.

The answer is the first answer choice.

This is because this inequality matches up with the graph.

Everything is shaded below, and y is less than, so it matches up.

3 is the y-intercept.

The slopes match up as well.

#teamtrees #WAP (Water And Plant)

Answer:

In my knowledge

3/12 = 8/2

3×8=24, 12×2=24 = 8/2

so

8/2 is the fraction that is equivalent to three twelfths

Answer:

80 degrees

Step-by-step explanation:

The total angle measure of a triangle, no matter the type, is always 180 degrees.

Using this, we can calculate the missing angle:

[tex]180=65+35+x[/tex]

[tex]x=180-(65+35)[/tex]

[tex]x=180-100[/tex]

[tex]x=80[/tex]

The measure of angle x in the triangle is 80 degrees.

The figure in the image is a triangle.

From the diagram:

Angle 1 = x

Angle 2 = 65 degrees

Angle 3 = 35 degrees

To solve for the measure of angle x, we use the fact the the sum of the interior angle of a triangle equals 180 degrees.

Hence:

Angle 1 + Angle 2 + Angle 3 = 180

Plug in the values:

x + 65 + 35 = 180

Collect and add like terms:

x + 100 = 180

Subtract 100 from both sides:

x + 100 - 100 = 180 - 100

x = 180 - 100

x = 80°

Therefore, angle x has a measure of 80 degrees.

Learn more about the interior angles in a triangle here: https://brainly.com/question/33265804

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