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3 years ago

I don’t know how to explain on why the student was incorrect

Mathematics

1 answer:

Zolol [24]3 years ago

7 0

Answer:

the constant proportionality means the ratio between two directly proportional quantities.

so the constant proportionality will be 7.5÷6=1.25 or 10÷8=1.25 or 12.5÷10=1.25

constant proportionality should be same all through because it's a constant

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Given sec theta=-4/3 and 90°

hoa [83]

Answer:

Option A.

Step-by-step explanation:

It is given secθ = - $\frac{4}{3}$

then cosθ = - $\frac{3}{4}$

Now we know the identity

sinθ = $\sqrt{1-cos^{2}\theta }$

= $\sqrt{1-(-\frac{3}{4} )^{2}}$

= $\frac{\sqrt{7} }{4}$

Now sin2θ = 2sinθcosθ

Now we put the values of cosine and sine in the formula

sin2θ = 2×(- $\frac{3}{4}$ )( $\frac{\sqrt{7}}{4}$ )

= - $\frac{3\sqrt{7}}{8}$

Therefore, option A. is the answer.

3 0

3 years ago

Find each quotient. Check your work using multiplication.

Blizzard [7]

Answer:

13. $15y^{4} + y^{3} +5y^{2} - 17y + 1$

14. $x^{4} + 6x^{3} - 15x^{2} + 20x - 15$

15. $-a^{4} + 12a^{3} + 18a^{2} + 0a + 20$

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

What is cot x(sin^2x+cos^2x)

shusha [124]

Answer:

cot(x)

Step-by-step explanation:

$cot\theta(sin^2\theta+cos^2\theta)$

$cot\theta(1)$

$cot\theta$

Recall the Pythagorean Identity $sin^2x+cos^2x=1$

6 0

2 years ago

Ashlynn rides her bike 2 miles to school and 2 miles home each day. How many total miles will Ashlynn ride her bike to school an

skad [1K]

Answer:

160

Step-by-step explanation:

2+2=4

4 x 40= 160

4 0

3 years ago

A certain company sells tea in loose leaf and bagged form, and in five flavors: Darjeeling, earl grey, chamomile, peppermint, an

ANTONII [103]

Answer:

- 20

Step-by-step explanation:

Given that,

Flavors of tea = 5

Types of packaging = 2

So,

No. of possibilities = 5 * 2

= 10

A.T.Q.,

4 from 5 total flavors will be included in the variety pack, the number of available choices = 5C4

= 5 choices

Since 5 choices are probable for each form, The total in two forms would be 5 * 2 = 10.

Therefore,

Total no. of different packs can be possible = 10 + 10

= 20

7 0

3 years ago