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Rufina [12.5K]
3 years ago
9

Barb went to grottos pizza and ordered 7 large pizzas Her total bill was $49

Mathematics
2 answers:
Naddika [18.5K]3 years ago
8 0

My answer would be c that my answer hope this helps

pav-90 [236]3 years ago
5 0

Answer:

x=7 and y=$49

Step-by-step explanation:

Let x be the # of pizzas ordered and k be the unit cost (per pizza).

Then we have y = kx = ($7/pizza)x.  In other words, k = $7/pizza, x = 7 and y = $49.  This is the third answer choice.

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Choose one of the factors of x15 − 64. (2 points)
Lorico [155]

We have been given the function x^{15}-64

Convert this expression in difference of cubes form.

x^{15}-64\\=(x^5)^3-4^3

Now, in order to find the factors, we can apply the difference of cubes form, which is given by

x^3-y^3=(x-y)(x^2+xy-y^2)

On applying this formula, we get

(x^5-4)(x^{10}+4x^5+16)

Hence, the factors of the given expression are

(x^5-4) \text{ and }(x^{10}+4x^5+16)

Out of the given option, A is the correct option.

x^5 − 4 is the required factor.

6 0
3 years ago
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Why is -a² is always negative (a ≠ 0) and why is (-a)² is always positive?
hjlf
-a^2=(-1)\cdot a\cdot a

Regardless of the sign of a, we have a\cdot a=a^2\ge0 (never negative). But multiplying by -1 makes it negative.

On the other hand,

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3 years ago
If W = 11 ft, X = 12.6 ft, Y = 7ft, and Z= 9.6ft, what is the area of her closet?
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Find the highest common factor (HCF) of 72 and 98.​
Y_Kistochka [10]

<em>Answer:</em>

<em>2</em>

<em>Step-by-step explanation:</em>

<em>The factors of 72: 1, </em><em>2</em><em>, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72</em>

<em>The factors of 98: 1, </em><em>2</em><em>, 7, 14, 49, 98 </em>

<em>Your greatest common factor is 2.</em>

<em>Hope this helps. Have a nice day.</em>

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3 years ago
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scZoUnD [109]

Answer:

8) 10 m 9) 26 in 10) 51 m 11) 50 ft 12) 19.4 cm 13) 177.9 m 14) 40 15) 12 16) 14.7 17) 12.1

Step-by-step explanation:

You may solve the problems by using the Pythagorean Theorem which states that c^2 = a^2 + b^2, or in other words, the hypotenuse squared is equal to the sum of the legs squared.

Hope this helps! :-)

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