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3 years ago

9

I need help with 7-10 please!

1 answer:

Evgesh-ka [11]3 years ago

6 0

7:
3/8 = 6/x
3x = 48
x = 16

8:
4/5 = (x+7)/40
160 = 5x + 35
5x = 125
x = 25

9:
3/8 = 12/(x-3)
3x - 9 = 96
3x = 105
x = 35

10:
4/1 = (3x+6)/x
4x = 3x + 6
x = 6

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NEED HELP IN MATH .THANKS

stira [4]

It's simple. as long as it's a 10 you just put in however many 0 it has as the root to a 1. or just multiply it however many times.
10x10x10 = 1000
so 10^3 = 1000
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3 years ago

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3 years ago

Can someone please help me! Big ideas 8.4 number 20

Harlamova29_29 [7]

<u>Answer:</u> The perimeter is about 20.26 units

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

To calculate the distance between the points, we use the formula:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

where,

d = distance

$x_2\text{ and }x_1$ are the coordinates of the points on x-axis

$y_2\text{ and }y_1$ are the coordinates of the points on y-axis

For the given points:

B(0,3), C(4,-1), E(2,-3) and F(-2,1)

Calculating the distance BC:

$x_2=4\\x_1=0\\y_2=-1\\y_1=3$

Putting values in above equation, we get:

$BC=\sqrt{(4-(0))^2+(-1-3)^2}\\\\d=\sqrt{16+16}=5.66units$

Calculating the distance CE:

$x_2=2\\x_1=4\\y_2=-3\\y_1=-1$

Putting values in above equation, we get:

$CE=\sqrt{(2-(4))^2+(-3-(-1))^2}\\\\d=\sqrt{36+4}=4.47units$

To calculate the perimeter of a rectangle, we use the equation:

$Perimeter=2(l+b)$ ....(1)

where,

l = length of the rectangle = BC = 5.66 units

b = breadth of the rectangle = CE = 4.47 units

Putting values in equation 1, we get:

$Perimeter=2(5.66+4.47)\\\\Perimeter=20.26 units$

Hence, the perimeter is about 20.26 units

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3 years ago

Gabrielle is traveling to Mexico and needs to exchange $440 into Mexican pesos. If each dollar is worth 11.84 pesos, how many pe

alexira [117]

Answer:

5209.60 pesos

Step-by-step explanation:

$440 x 11.84= 5209.60

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3 years ago

What is the slope intercept form for the equation of the line provided?

denis-greek [22]

1. The slope intercept form is:

$y=mx+b$

Where $m$ is the slope of the line and $b$ is the intercept with the y-axis.

2. To calculate the slope, you can use the following formula:

$m=\frac{y_2-y_1}{x_2-x_1}$

Where:

$y_2=-1\\y_1=\frac{15}{2}\\x_2=\frac{1}{8}\\x_1=-2$

3. So:

$m=\frac{-1-(\frac{15}{2})}{\frac{1}{8}-(-2)}=-4$

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5. Therefore, the answer is the last option:

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3 years ago