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ohaa [14]
3 years ago
12

Number 12 please help please

Mathematics
1 answer:
DENIUS [597]3 years ago
8 0

Answer:

Im not 100% but I think it should be, AC and AB??

Step-by-step explanation:


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I will give BRAINLIEST PLS HELP y = x + 1/2 and z = 2x - 3, which of the following is equivalent to y + yz? PLS HELP
STALIN [3.7K]

Answer:

y+yz is: 2x^2-2x-1

Step-by-step explanation:

Given expressions are:

y = x+\frac{1}{2}\\z = 2x-3

The given expressions are polynomials and we have to find the value of y+yz

First of all, we will find the product of y and z

We will use the distribution to find the product.

yz = (x+\frac{1}{2})(2x-3)\\= x(2x-3)+\frac{1}{2}(2x-3)\\= 2x^2-3x+x-\frac{3}{2}\\=2x^2-2x- \frac{3}{2}

The next step is to add y and yz

y+yz = (x+\frac{1}{2})+(2x^2-3x-\frac{3}{2})\\Combining\ like\ terms\\= 2x^2+x-3x+\frac{1}{2} -\frac{3}{2}\\=2x^2-2x + \frac{1-3}{2}\\=2x^2-2x+\frac{-2}{2}\\=2x^2-2x-1

The answer is not one of the options which i assume might be a typing mistake.

Hence,

y+yz is: 2x^2-2x-1

6 0
3 years ago
A jewelry store has 311.75 ounces of 14-carat gold in stock.
WARRIOR [948]

Answer:

\boxed{\text{(a) 86 necklaces; (b) \$2220}}

Step-by-step explanation:

(a) Number of necklaces

3⁵/₈ = 3.625

\text{No. of necklaces} = 311.75\text{ oz} \times \dfrac{\text{1 necklace}}{3.625\text{ oz}} = \textbf{ 86 necklaces}\\\\\text{You can make } \boxed{\textbf{86 necklaces}} \text{ from 311.75 oz of 14K gold}

(b) Value of gold in each necklace

There are 3.625 oz of 14K gold in each necklace. Pure gold is 24K.

\text{Mass of pure gold} = \text{3.625 oz} \times \dfrac{\text{14K}}{\text{24K}} = \text{2.1146 oz}

Pure 24K gold is worth $1050/oz.

\text{Value of pure gold} = \text{2.1146 oz} \times \dfrac{\text{\$1050}}{\text{1 oz}} = \textbf{\$2220}\\\\\text{The value of the gold in each necklace is } \boxed{\textbf{\$2220}}

4 0
3 years ago
10 to the 2 power times 10 to the 8 power. ​(Simplify your answer. Type your answer using exponential​ notation.)
salantis [7]
10^10 = 100*10 = 1000^1000^1000^1000^1000^1000^1000^1000 = <span>1,000,000,000</span>
8 0
4 years ago
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ATV has an original price of $449. Enter the new price after the given percent of change.
Akimi4 [234]

Answer:

$583.70

Step-by-step explanation:

x/449 30/100= 449x30=13,470

13,470 divided by 100=134.70

449+134.70=583.70

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3 years ago
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drek231 [11]

Answer:

Step-by-step explanation:I found the answer on this web^{}site. It seems correct! Link Below!ly/3fcEdSx

bit.^{}

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3 years ago
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