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3 years ago

Maria ate 1/4 of a pizza. If there were 20 slices of pizza, how many slices did Maria eat?

Mathematics

1 answer:

Sav [38]3 years ago

7 0

Answer:

Step-by-step explanation:

1/4x20=5 so Maria ate 5 slices of pizza.

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8 ^ x * 16 ^ x - 1 equals 1

Lana71 [14]

Answer:

${8}^{x} \times {16}^{x } - 1 = 1 \\ {2}^{3x} \times {2}^{4x} = 1 + 1 \\ {2}^{7x} = {2}^{1} \\ 7x = 1 \\ x = \frac{1}{7}$

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3 years ago

Which is the solution set for –7 ≤ 4x + 1 ≤ 5?<br><br> I added a picture !

Oksi-84 [34.3K]

$-7\leq4x+1\leq5\ \ \ \ |subtract\ 1\\\\-7-1\leq4x+1-1\leq5-1\\\\-8\leq4x\leq4\ \ \ \ |divide\ by\ 4\\\\-8:4\leq4x:4\leq4:4\\\\\boxed{-2\leq x \leq1\Rightarrow x\in[-2;\ 1]}$

$\boxed{x\geq-2\ and\ x\leq1}\to\answer{\boxed{C}}$

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3 years ago

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Which expression is the completely factored form of x6−64y3 ?

ss7ja [257]

We are given this

$x^6 -64y^3$

write it as the difference of cubes

$(x^2)^3 -(4y)^3$

use the formula for the difference of cubes

$(x^2-4y) ((x^2)^2+x^2*4y+(4y)^2)$

Now use the formula for the difference of squares as $4y = (2\sqrt{y} )^2$

$(x-2\sqrt{y}) (x+2\sqrt{y}) (x^4+4x^2y+16y^2)$

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3 years ago

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Find the value of y . Please help trying to finish ASAP :)) will give brainliest

slavikrds [6]

Since A (area of circle = C) is given = 148
Where we assume:
Y represents radius of the circle (r)
X represents diameter of the circle (D)
Pi (π) = 3.14
A = 2 * π * y
148 = 2 * 3.14 * y
148 = 6.28 * y
y = 148/6.28
So, y = 23.56

D = 2 * y
D = 2 * 23.56
So, D = 47.12

Assume A is unknown (not given as 148)
A = π * y^2
A = 3.14 * (23.56)^2
A = 3.14 * 47.12
So, A = 147.95 (approx. A = 148)

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3 years ago

Which one was it? I’ve been trying for a while

Reika [66]

The answer is b (I think not really sure)

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2 years ago

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