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dusya [7]
3 years ago
8

Find the value of the expression below for x=10 x ^2 - 2 (x + 5)

Mathematics
2 answers:
zheka24 [161]3 years ago
8 0
Hopefully this helps
Thepotemich [5.8K]3 years ago
7 0

Answer:

20

Step-by-step explanation:

your welcome!!

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Please answer with clear instructions so that i can apply this to other questions.
kvv77 [185]

Answer:

10 terms

Step-by-step explanation:

equate the sum formula to 55 and solve for n

\frac{1}{2} n(n + 1) = 55 ( multiply both sides by 2 to clear the fraction )

n(n + 1) = 110 ← distribute parenthesis on left side

n² + n = 110 ( subtract 110 from both sides )

n² + n - 110 = 0 ← in standard form

Consider the factors of the constant term (- 110) which sum to give the coefficient of the n- term (+ 1)

the factors are + 11 and - 10 , since

11 × - 10 = - 110 and 11 - 10 = + 1 , then

(n + 11)(n - 10) = 0 ← in factored form

equate each factor to zero and solve for n

n + 11 = 0 ⇒ n = - 11

n - 10 = 0 ⇒ n = 10

However, n > 0 , then n = 10

number of terms which sum to 55 is 10

7 0
2 years ago
The sum of 2 numbers is 84 if one number is 4.less than the other find the numbers​
artcher [175]

Answer:

one number= x = 44

the other number= (x-4)= 40

Step-by-step explanation:

one number= x

the other number= (x-4)

x + (x-4) = 84

2x= 84+4

2x= 88

x= 88/2= 44

one number= x = 44

the other number= (x-4)= 40

3 0
2 years ago
Read 2 more answers
WILL GIVE BRAINLIEST The angle of elevation from Ben to the top of a telephone pole is 62 degrees. If Ben is standing 8 feet fro
MrRissso [65]

Answer: The height of the telephone pole = $15.046

Step-by-step explanation:

Given: Angle of elevation= 62 degrees.

Distance of Ben from the base of the pole = 8 feet

According to trigonometry, we have

\tan x=\dfrac{\text{side opposite to x}}{\text{side adjacent to x}}

i.e.

\tan 62^{\circ}=\dfrac{\text{ height of the telephone pole}}{8}\\\\(1.880726)=\dfrac{\text{ height of the telephone pole}}{8}\\\\\text{ Height of the telephone pole} = 8\times 1.880726\approx15.046

Hence, The height of the telephone pole = $15.046

4 0
3 years ago
Precalculus question, image attached.
natta225 [31]

Answer:

g(x)= x+1

Step-by-step explanation:

h(x)= (fog)(x)= f(g(x))

Given f(x)= \sqrt[3]{x+2},  f(x)= \sqrt[3]{x+3}

f(g(x))= \sqrt[3]{x+3}

f(x)= \sqrt[3]{x+2}

Replace x with g(x)

f(g(x))= \sqrt[3]{g(x)+2}

Now we need to find out what we plug in for g(X) to get x+3 under the radical

g(x) +2 is under the radical. we need x+3 , so we replace g(x) with x+`

So g(x)+2 becomes x+1+2 is x+3

Hence g(x) is x+1


6 0
3 years ago
What is the sum of 4x^2+2x-5 and 7x^2​​−5x+2?
S_A_V [24]
Hello there!

It would be 11x² - 3x - 3.

Hope This Helps You!
Good Luck :)
4 0
3 years ago
Read 2 more answers
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