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Sergeu [11.5K]
3 years ago
14

Given the functions j(x) = x2 − 9 and k(x) = −x + 7, which operation results in a 3rd degree polynomial?

Mathematics
1 answer:
sveta [45]3 years ago
7 0
So <span>when you multiply j(x) with k(x), the first term will be -x^3. So multiplication.

 I hope this helps
</span>
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200% of 50 is 20% of which number?
3241004551 [841]

Answer:

5

Step-by-step explanation:

200% × x = 20. x = 10. 50% of a number = 50% × 10 = 50÷100×10 = 0.5 × 10 = 5.

5 0
2 years ago
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What is 2x times x squared?
tresset_1 [31]

We want to multiply the monomial 2x by the monomial 2x^2.

Remember that to multiply monomials we need to use the laws of exponents; in this case, the law for multiplying powers with the same base. The rule says that, when you multiply powers of the same base, you just need to add the exponents: (a^m)(a^n)=a^{m+n}, (x^2)(x^4)=x^{2+4}=x^6. Also, is worth pointing out that the exponent of a variable with no exponent is 1: x=x^1.

Remember that we also need to multiply their coefficients , which are the numbers that multiply the variables; again, variables with no numbers have a coefficient of 1, so x=1x. Multiply coefficients is easy, you just need to multiply them as you usually do with everyday numbers.

Let's apply all of that to our multiplication:

(2x)(x^2)=(2x^1)(1x^2)=2*1x^{1+2}=2x^3

We can conclude that 2x times x squared is 2x cubed.



3 0
3 years ago
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Nancy has worn a blue skirt on 8 of the last 20 days.
Gala2k [10]

Answer:

it's just 8/20 so shade 8/20 of the circle

8 0
2 years ago
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Drew wants to buy exercise equipment that costs $140 and the sales tax is 5.57% what is the total cost of the equipment
Eddi Din [679]

Answer:

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140 x .0557 = 7.80 Tax

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140 + 7.80 = $147.80

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The sum of the areas of two circles is 80 pi
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A1 + A2 = 80π
Substitute the formula for the area,
π(r1)^2 + π (r2)^2 = 80π

From the statement, we know that r2=2(r1).

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</span>We can cancel π, we will have

5 x (r1)^2 = 80
Thus,

r1 = 4 and r2 = 8
5 0
3 years ago
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