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3 years ago

What is the answer for 4b -7 - 15b + 3

1 answer:

4 0

If you combine like terms 4b and the 15b you will get 11b then -7 plus 3 you will get -4. The answer will just simply be -11b - 4

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Need help with math problems give 5 stars and good rating if you do a math problem

Zepler [3.9K]

Answer: I cant see the full question but I would say figure D

Step-by-step explanation:

30/20 in half is 15/10

also between 12/8 and 18/12 is 15/10

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2 years ago

In Exercises 10 and 11, points B and D are points of tangency. Find the value(s) of x.<br>

Lemur [1.5K]

In both cases,

$AB^2=AD^2$

(as a consequence of the interesecting secant-tangent theorem)

So we have

10.

$(4x+7)^2=(6x-3)^2$

$16x^2+56x+49=36x^2-36x+9$

$20x^2-92x-40=0$

$5x^2-23x-10=0$

$(5x+2)(x-5)=0\implies\boxed{x=5}$

(omit the negative solution because that would make at least one of AB or AD have negative length)

11.

$(4x^2-18x-10)^2=(x^2+x+4)^2$

$16x^4-144x^3+244x^2+360x+100=x^4+2x^3+9x^2+8x+16$

$15x^4-146x^3+235x^2+352x+84=0$

$(x-7)(3x+2)(5x^2-17x-6)=0\implies\boxed{x=-\dfrac23\text{ or }x=7}$

(again, omit the solutions that would give a negative length for either AB or AD)

7 0

3 years ago

A computer monitor is listed as being 17 inches. This is the diagonal across the screen. If the screen measures 10 inches in hei

Aneli [31]

diagonal = sqrt(l^ + w^2)

17 = sqrt(10^2 + x^2)

17^2 = 10^2 + x^2

289 = 100 + x^2

189 = x^2

x = sqrt(189) = 13.747

X = 13.75

width is 13.75 inches

3 0

3 years ago

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Mashutka [201]

Answer:

5b^9/a^3

Step-by-step explanation:

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2 years ago

I’m so confused. what is part B?

Alenkinab [10]

Answer:sorry

Step-by-step explanation:

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3 years ago