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Mamont248 [21]
2 years ago
12

Amanda simplifies the following expression and shows her work below. What mistake did Amanda make that resulted in an incorrect

answer?
14−8÷2 + 3∙4

14−4 + 3∙4

14 – 7 ∙ 4

14−28

-14

a
She added before multiplying

b
She multiplied before dividing

c
She subtracted before adding

d
She added before dividing
Mathematics
1 answer:
Hatshy [7]2 years ago
4 0

Answer:

A

Step-by-step explanation: When she got to 14-4+3*4 she added 4+3 first instead of multiplying 3*4.

You might be interested in
Determine the measure of ∠A. ANSWWER: 1) 192° 2) 88° 3) 84° 4) 168°
hichkok12 [17]

Answer:

3) 84°

Step-by-step explanation:

The angle formed by a chord and a tangent measures half of the intercepted arc.

m<A = (1/2)m(arc) = (1/2) * (168 deg) = 84 deg

7 0
3 years ago
Please helpp i need this rn if possible
Troyanec [42]

Answer:

140, 60

Step-by-step explanation:

15x+5 + < CDB =180 line form an 180 angle

180-80-6x-6 = < CDB sum of angles in a triangle is 180

substitute < CDB from second to first

15x+5+180 -80-6x-6 =180

combine like terms

9x -81 =0

x=81/9=9

so angle YDC = 15*9+5 = 140 degrees

and angle DBC = 6*9+6= 60 degrees

4 0
2 years ago
Question 5
Harrizon [31]

Answer:

h ( t ) = 4 sin ( 100\pi*t )

Step-by-step explanation:

Solution:-

The position of any particle or object lying on a circular surface which is rotating with an angular speed of ( w ).

The motion of the particle/object can be expressed as sinusoidal or harmonic motion. We can express the motion of the particle in the cartesian coordinate system using a sinusoidal waveform.

The position of the particle/object from the central axis at time t = 0 can be given in the form:

                    h ( t ) = A*sin ( w*t )

Where,       A: The amplitude of the particle in motion ( in )

                  w: The angular frequency of rotation ( rad/s )

The amplitude ( A ) of the sinusoidal waveform is determined from the maximum displacement of the particle/object from the horizontal axis which defined by the radius of the fidget spinner where the particle is located. Hence, A = 4 in

The fidget rotates at 3000 rpm. We need to determine the angular speed of the particle. Assuming no slip conditions, the particle also rotates at 3000 rpm.

We will first convert 3000 rpm into rad/s as follows:

                     f= \frac{3000 rev}{min} * \frac{min}{60 s} = 50 \frac{rev}{s} \\\\w = 2\pi f\\\\w = 2\pi \frac{rad}{rev} * \frac{50 rev}{s} \\\\w = 100\pi \frac{rad}{s}

The sinusoidal function that models h ( t ) can be written as:

                     h ( t ) = 4 sin ( 100\pi*t )

8 0
2 years ago
Jose and Maris work for different car dealerships. Jose earns a monthly salary of $3,500 plus a 6% commission on his sales, x. M
Natalija [7]

Answer:

(A)3,500 + 0.06x > 4,000 + 0.04x

Step-by-step explanation:

<u>Jose's Earnings</u>

Monthly Salary = $3,500

6% commission on his sales, x =0.06x

Total = 3500+0.06x

<u>Maris' Earnings</u>

Monthly Salary = $4,000

4% commission on her sales, x =0.04x

Total = 4000+0.04x

If Jose's earnings be greater than Maris' earnings, then:

3500+0.06x > 4000+0.04x

3 0
2 years ago
Evaluate 5/9 / 15/32
kupik [55]
You multiple by the reciprocal
(5/9) x (32/15) = 160/135

Which simplified to 32/27
6 0
3 years ago
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