It takes

Mathematics

2 answers:

KonstantinChe [14]4 years ago

7 0

There are 56 minutes for 10 people to paint 7 walls!

kumpel [21]4 years ago

5 0

4 people paint 8 walls in 60 minutes

1 person paints 8 walls in 240 minutes

1 person paints 1 wall in 30 minutes

5 people paint 1 wall in 6 minutes

5 people paint 4 walls in 24 minutes

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Simplify the following expression and then write down the coefficient of x²: x² + x² + x² + x²

lapo4ka [179]

Answer:

The expression is 4x² and coefficient is 4.

Step-by-step explanation:

All have the same variables, x², so you add up together :

$1{x}^{2} + 1{x}^{2} + 1{x}^{2} + 1{x}^{2}$

$= 4 {x}^{2}$

7 0

3 years ago

2) Simplify the expression: - - 1 (6x – 10).

makkiz [27]

Answer:

6x-10

Step-by-step explanation:

see image below

7 0

3 years ago

Faith is tracking the number of burpees she does at a constant rate. Last

bija089 [108]

This is a unit rate question. We can solve this in chronological order of steps:

Step 1: Write out the beginning for the first unit rate.

Faith completed 60 burpees in 5 minutes last week.

Step 2: Since 60 burpees were completed in 5 minutes, we can divide 60 by 5 to find how many burpees were completed in 1 minute.

60 divided by 5 equals 12.
5 divided by 5 equals 1.

Our fraction for how many burpees Faith did in a minute last week is 12/1. This reduces to 12, meaning that Faith did 12 burpees last week.

Step 3: Find the unit rate for this week.

Faith completed 78 burpees in 6 minutes this week. Because of this, we can divide 78 by 6 to find how many burpees Faith completed this week.

78 divided by 6 equals 13.
6 divided by 6 equals 1.

Our final fraction for how many completed burpees Faith did this week is 13/1, which reduces to 13. Therefore, Faith completed 13 burpees per minute this week.

Your final answer: In terms of separate values, Faith completed 12 burpees per minute last week and 13 burpees per minute this week. If you need help, let me know and I will gladly assist you.

6 0

2 years ago

URGENT!! Solve the following for θ, in radians, where 0≤θ<2π.

lidiya [134]

Answer: 0.93 radians & 2.21 radians

Step-by-step explanation:

$-4sin^2\theta-3sin\theta+5=0\\\\\text{Since this is not factorable, use the quadratic formula to find the roots:}\\\\sin\theta=\dfrac{-(-3)\pm \sqrt{(-3)^2-4(-4)(5)}}{2(-4)}\\\\\\.\quad=\dfrac{3\pm \sqrt{9+80}}{-8}\\\\\\.\quad=\dfrac{3\pm\sqrt{89}}{-8}\\\\\\.\quad=\dfrac{3\pm9.43}{-8}\\\\\\.\quad=\dfrac{12.43}{-8}\quad and\quad \dfrac{-6.43}{-8}\\\\\\.\quad=-1.55\quad and\quad 0.80\\\\\\\theta=sin^{-1}(-1.55)\quad and\quad \theta=sin^{-1}(0.80)$