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3 years ago

Need Help Asap Plzzzz

Mathematics

2 answers:

Nina [5.8K]3 years ago

3 0

Answer:

Step-by-step explanation:

7/1=7

16/2=8

21/3=7

32/4=8

35/5=7

She is making 8 dollars per hour but in her chart she shows that she is making 7 dollars per hour in most of her calculations.

Alekssandra [29.7K]3 years ago

3 0

Answer:

they make 8$ an hour

Step-by-step explanation:

1,8

2,16

3,24

4, 32

5,40

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Find the measure of side XY.

Ymorist [56]

Answer:

XY = 18

Step-by-step explanation:

The figures are similar so the ratios of corresponding sides are equal, that is

$\frac{XY}{BC}$ = $\frac{YZ}{CD}$ , substitute values

$\frac{XY}{12}$ = $\frac{15}{10}$ ( cross- multiply )

10 XY = 180 ( divide both sides by 10 )

XY = 18

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3 years ago

Is it 1 solution, no solution or infinite solution? <br> -28 = -7(3x + 4) + 21

prohojiy [21]

x = 1 because -7(3x + 4) must be -49 so 3x + 4 must me 7 so x = 1

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4 years ago

Given: - 1/2 x > 4

Romashka [77]

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3 years ago

Which values of a, b, and c represent the answer in simplest form?<br><br> 7/9 * 4/9 = a b/c

myrzilka [38]

Answer:

Option 2: A=1, B=3, C=4

Step-by-step explanation:

7/9÷4/9 = 7/9*9/4
cancel 9 on each side
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3 years ago

Find the value of x² - x+1 when x=√3 -1, in the form a+b√3 where a and b are integers

lidiya [134]

Answer:

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

Step-by-step explanation:

We are given $x=\sqrt{3}-1$ and we are asked to find the value of $x^2-x+1$ .

So we will need to find $x^2$ .

$x=\sqrt{3}-1$

Square both sides:

$x^2=(\sqrt{3}-1)^2$

Expand using identity: $(x-a)^2=x^2-2ax+a^2$ .

$x^2=(\sqrt{3})^2-2(\sqrt{3})(1)+1^2$

$x^2=3-2\sqrt{3}+1$

$x^2=4-2\sqrt{3}$

Let's go back to the full $x^2-x+1$ .

$x^2-x+1$

$(4-2\sqrt{3})-(\sqrt{3}-1)+1$

$4-2\sqrt{3}-\sqrt{3}+1+1$

$6-3\sqrt{3}$

If you compare this to $a+b\sqrt{3}$ , then $a=6$ and $b=-3$ .

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4 years ago