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
Nana76 [90]
2 years ago
5

Need help please answer ASAP!

Mathematics
1 answer:
Dmitrij [34]2 years ago
6 0

Answer:

   46. <u>(3) 29</u>

   47. <u>(1) y = -4x + 3</u>

   48. <u>(3) 3</u>

   49. <u>(3) -1/2</u>

   50. <u>(4) 25x - 75</u>

Step-by-step explanation:

<u>Question 46</u>

  • Let red marbles be 2x + 3 and black marbles be x
  • 2x + 3 + x = 42
  • 3x = 39
  • x = 13
  • No. of red = 2(13) + 3 = 29 marbles
  • <u>(3) 29</u>

<u></u>

<u>Question 47</u>

  • Parallel to a line means the slope is the same
  • <u>(1) y = -4x + 3</u>

<u></u>

<u>Question 48</u>

  • For the expression to be undefined, the denominator has to be 0
  • x - 3 = 0
  • x = 3
  • <u>(3) 3</u>

<u></u>

<u>Question 49</u>

  • Slope = -4 - 1 / 4 + 6
  • Slope = -5/10
  • Slope = -1/2
  • <u>(3) -1/2</u>

<u></u>

<u>Question 50</u>

  • Total = 25x
  • Left 3 boxes at home = -3x = -3(25) = -75
  • <u>(4) 25x - 75</u>
You might be interested in
In the study of pesticide use and breast cancer, researchers evaluated pesticide use during the entire life of the respondents.
Doss [256]

Answer:

Kindly check explanation

Step-by-step explanation:

A common problem with most research designs is bias, which could be introduced win several ways one if which is the favored selection of certain variables rather than being randomized. In the scenario above, the sampling time frame introduces a bias into the design as the tune span of pesticide use does not allay with that of the exposure history of the respondent. Therefore an entire lifetime evaluation of one variable and just 20 years evaluation of the other introduces a sampling bias into the research design. Similarly, evaluation the type of pesticide usage over certain time period may need to be considered as the effect of very old pesticides may differ from those used very recently.

4 0
3 years ago
Can you tell me how to calculate R for below Matrix ?
scoray [572]

Answer:

The rank of the matrix is 3.

Step-by-step explanation:

Consider the prided information.

x=\begin{bmatrix}x_1\\ x_2\\ x_3\end{bmatrix}=\begin{bmatrix}9&2&6&5&8\\ 12&8&6&4&10\\ 3&4&0&2&1\end{bmatrix}

Reduce the matrix in row echelon form as shown:

R_1\:\leftrightarrow \:R_2\begin{bmatrix}12&8&6&4&10\\ 9&2&6&5&8\\ 3&4&0&2&1\end{bmatrix}\\

R_2\:\leftarrow \:R_2-\frac{3}{4}\cdot \:R_1\ and\ R_3\:\leftarrow \:R_3-\frac{1}{4}\cdot \:R_1\\\\\begin{bmatrix}12&8&6&4&10\\ 0&-4&\frac{3}{2}&2&\frac{1}{2}\\ 0&2&-\frac{3}{2}&1&-\frac{3}{2}\end{bmatrix}

R_3\:\leftarrow \:R_3+\frac{1}{2}\cdot \:R_2\\\begin{bmatrix}12&8&6&4&10\\ 0&-4&\frac{3}{2}&2&\frac{1}{2}\\ 0&0&-\frac{3}{4}&2&-\frac{5}{4}\end{bmatrix}

R_2\:\leftarrow \:R_2-\frac{3}{2}\cdot \:R_3\ and\ R_1\:\leftarrow \:R_1-6\cdot \:R_3\\\begin{bmatrix}12&8&0&20&0\\ 0&-4&0&6&-2\\ 0&0&1&-\frac{8}{3}&\frac{5}{3}\end{bmatrix}\\R_2\:\leftarrow \:-\frac{1}{4}\cdot \:R_2\ , \ R_1\:\leftarrow \:R_1-8\cdot \:R_2\ and\ \:R_1\:\leftarrow \frac{1}{12}\cdot \:R_1\\\begin{bmatrix}1&0&0&\frac{8}{3}&-\frac{1}{3}\\ 0&1&0&-\frac{3}{2}&\frac{1}{2}\\ 0&0&1&-\frac{8}{3}&\frac{5}{3}\end{bmatrix}

The rank of a matrix is the number of non zeros rows.

Thus, the rank of the matrix is 3.

6 0
3 years ago
A 12-ounce box of cereal is priced at $3.60 while a20-ounces box of the same brand of cereal is priced at $5.00. What is the dif
trapecia [35]

Answer:   .05


Step-by-step explanation: 3.60 divided by 12: 0.3

5.00 divided by 20: 0.25


0.3-0.25=0.05


3 0
3 years ago
You are scheduling a new delivery route and you need to find out how long it will take a driver to complete the route. You start
Sergio039 [100]
The route will take four hours and fifteen minutes. If you start at 9:50 and count four hours, you'll get to 1:50, add ten to get to 2:00, then add 5 minutes to get to 2:05. Four hours plus ten minutes plus five minutes, 4:15.
4 0
3 years ago
Read 2 more answers
In 4 hours, you hike 10 miles. Which unit rate describes your speed on the hike?
USPshnik [31]
2.5 mph is the answer I believe!
8 0
3 years ago
Read 2 more answers
Other questions:
  • The giant swallowtail is the largest butterfly
    13·1 answer
  • Which is greater 60% or ⅝
    12·2 answers
  • How was the Pythagorean theorem derived
    12·1 answer
  • Write the expression in complete factored form<br> 5(y - 7) + b(y-7) =
    8·1 answer
  • There are 27
    8·1 answer
  • Can someone please help
    5·2 answers
  • UHHhh helpppppppppppp &lt;3 c':
    9·1 answer
  • Can you guys help me? The question is in the image
    9·2 answers
  • -3/7 + 1/7 please help me i am on a text and i need help
    6·1 answer
  • Due today no link no files please
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!