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olya-2409 [2.1K]
3 years ago
15

The place value disk model is showing 67 ÷ 4.

Mathematics
1 answer:
exis [7]3 years ago
3 0

Answer:

The 2 tens remaining get decomposed into 20 ones in the ones column.

Step-by-step explanation:

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How do i solve this.
jasenka [17]

Answer:

here is the answer to your question

5 0
2 years ago
A student is given that point P(a, b) lies on the terminal ray of angle Theta, which is between StartFraction 3 pi Over 2 EndFra
Harman [31]

Answer:

<em>A.</em>

<em>The student made an error in step 3 because a is positive in Quadrant IV; therefore, </em>

<em />cos\theta = \frac{a\sqrt{a^2 + b^2}}{a^2 + b^2}

Step-by-step explanation:

Given

P\ (a,b)

r = \± \sqrt{(a)^2 + (b)^2}

cos\theta = \frac{-a}{\sqrt{a^2 + b^2}} = -\frac{\sqrt{a^2 + b^2}}{a^2 + b^2}

Required

Where and which error did the student make

Given that the angle is in the 4th quadrant;

The value of r is positive, a is positive but b is negative;

Hence;

r = \sqrt{(a)^2 + (b)^2}

Since a belongs to the x axis and b belongs to the y axis;

cos\theta is calculated as thus

cos\theta = \frac{a}{r}

Substitute r = \sqrt{(a)^2 + (b)^2}

cos\theta = \frac{a}{\sqrt{(a)^2 + (b)^2}}

cos\theta = \frac{a}{\sqrt{a^2 + b^2}}

Rationalize the denominator

cos\theta = \frac{a}{\sqrt{a^2 + b^2}} * \frac{\sqrt{a^2 + b^2}}{\sqrt{a^2 + b^2}}

cos\theta = \frac{a\sqrt{a^2 + b^2}}{a^2 + b^2}

So, from the list of given options;

<em>The student's mistake is that a is positive in quadrant iv and his error is in step 3</em>

3 0
3 years ago
The cost of a long distance call is $1.25 for the
Vinil7 [7]
C

For first 3 minutes keep 1.25
Then for rest do 0.15(x-3)
Now add to get total cost



Mark brainliest please
8 0
3 years ago
Read 2 more answers
Sorry i'm the most non-smart person on the planet someone help me please! PLease show work.
Tpy6a [65]

Answer:

25

Step-by-step explanation:

The whole straight line is 180 And the angles are adjacent.

180-125 which equals 55

trying to find X so subtract 30

55-30=25

5 0
2 years ago
Find: m∠1, m∠2, and m∠5 in degrees
gulaghasi [49]

Answer:

<1 = 100

<2 = 80

Step-by-step explanation:

Angle 1 and angle 2 are supplementary

Supplementary angles add to 180 degrees

<1 + <2 = 180

The angles are in a ratio of 5 to 4

Multiply by x to get the measure of each angle

<1 = 5x  <2 = 4x

5x+4x = 180

Combine like terms

9x = 180

Divide by 9

9x/9 =180/9

x =20

<1 = 5x = 5*20 = 100

<2 = 4x = 4*20 = 80

6 0
3 years ago
Read 2 more answers
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