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2 years ago

I need help with math!!! time is running out!!! will mark brainliest!!!

Mathematics

2 answers:

Alexus [3.1K]2 years ago

5 0

1.

Answer B.

2.

Answer B.

3.

Answer B.

4.

Answer B.

5.

Answer B.

umka2103 [35]2 years ago

3 0

1.C

2.A

3.C

4.D

5.B

I hope I helped!

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Which equation is a step in solving the equation 5 - 3x + 2 = 19?

Leni [432]

Answer:

D. 5-3x = 17

Step-by-step explanation:

The step carried out was subtracting 2 from both sides.

$5 - 3x + 2 = 19 \\ 5 - 3x + 2 - 2 = 19 - 2 \\ 5 - 3x = 17$

4 0

3 years ago

Pls help 15 points pls hurry

Alexus [3.1K]

Answer:

5k and -3k are like variables

constants 7 and -2 are like terms

5+2k+n is equivalent expression

Step-by-step explanation:

3 0

2 years ago

A machine cuts 25 circuit boards every 5 minutes. What is the unit rate of production for the machine?

Sladkaya [172]

Answer:

B- 5/1 boards/minutes

Step-by-step explanation:

<u>Unit rate is the number of circuit boards a minute:</u>

25 boards every 5 minutes >>
25/5 boards every 5/5 minutes >>
5/1 boards/minutes

Correct choice is B

3 0

2 years ago

At 8:00 am, here's what we know about two airplanes: Airplane #1 has an elevation of 80870 ft and is decreasing at the rate of 4

wel

Let's begin by listing out the information given to us:

8 am

airplane #1: x = 80870 ft, v = -450 ft/ min

airplane #2: x = 5000 ft, v = 900ft/min

We must note that the airplanes are moving at a constant speed. The equation for the airplanes is given by:

$\begin{gathered} E=x_1+vt----1 \\ E=x_2+vt----2 \\ where\colon E=elevation,ft;x=InitialElevation,ft; \\ v=velocity,ft\text{/}min;t=time,min \\ x_1=80,870ft,v=-450ft\text{/}min \\ E=80870-450t----1 \\ x_2=5,000ft,v=900ft\text{/}min \\ E=5000+900t----2 \end{gathered}$

We equate equations 1 & 2 to get the time both airlanes will be at the same elevation. We have:

$\begin{gathered} 5000+900t=80870-450t \\ \text{Add 450t to both sides, we have:} \\ 900t+450t+5000=80870-450t+450t \\ 1350t+5000=80870 \\ \text{Subtract 5000 from both sides, we have:} \\ 1350t+5000-5000=80870-5000 \\ 1350t=75870 \\ \text{Divide both sides by 1350, we have:} \\ \frac{1350t}{1350}=\frac{75870}{1350} \\ t=56.2min \\ \\ \text{After }56.2\text{ minutes, both airplanes will be at the same elevation} \end{gathered}$

The elevation at that time (when the elevations of the two airplanes are the same) is given by substituting the value of time into equations 1 & 2. We have:

$\begin{gathered} E_1=80870-450t \\ E_1=80870-450(56.2) \\ E_1=80870-25290 \\ E_1=55580ft \\ \\ E_2=5000+900t \\ E_2=5000+900(56.2) \\ E_2=5000+50580 \\ E_2=55580ft \\ \\ \therefore E_1\equiv E_2=55580ft \end{gathered}$

6 0

8 months ago

You can afford a $1350 per month mortgage payment. You’ve found a 30 year loan at 7% interest.

Mice21 [21]

A) 45 because 1350 divide by 30 equals 45. So 45 dollars u can afford

B) 1350 because 45 x 30 = 1350

C) 7% because it’s 7% to begin with

4 0

3 years ago