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3 years ago

Help with #7 and #8?

Mathematics

1 answer:

arsen [322]3 years ago

5 0

Answer:

M(6,5) and G(2,9)

Step-by-step explanation:

$m = ( \frac{x1 + x2}{2}, \frac{y1 + y2}{2} )$

B(3,6)

C(9,4)

m = [(3+9)/2 , (6+4)/2]

= (6,5)

M(5,9)

H(8,9)

G(x,y)

[(x+8)/2 , (y+9)/2]=(5,9)

(x+8)/2 = 5

x+8 = 10

x = 2

(y+9)/2 = 9

y+9 = 18

y = 9

G(2,9)

(Correct me if i am wrong)

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The diameter of the Sun is about 1.4 x 106 km. The diameter of the planet

den301095 [7]

Answer:

1.17*10²

Step-by-step explanation:

Diameter of the sun is about 1.4 × 10⁶ km

1.4*10⁶ km = 1,400,000

Diameter of the planet venus is about 12000 km

12000 km = 1.2 × 10⁴

Ratio of the diameters

Sun : Venus

1.4 × 10⁶ km : 1.2 × 10⁴

1.4 × 10⁶ km / 1.2 × 10⁴

1.4 / 1.2 × 10^6-4

1.166 × 10²

Approximately

1.17 × 10²

7 0

2 years ago

EXPAND THE POLONOMIAL (5a+1/2b)^2 HELPPP ASAP

stepan [7]

Answer:

25 $a^{2}$ +5ab+ $\frac{b^{2} }{4}$

Step-by-step explanation:

$(5a+\frac{1}{2} b)^{2}$

1. First, write out the expression without the square

$(5a+\frac{1}{2} b)(5a+\frac{1}{2} b)$

2. Then use foil to multiply:

5a*5a+5a* $\frac{1}{2}b$ + $\frac{1}{2}b$ *5a+ $\frac{1}{2}b$ * $\frac{1}{2}b$

=25 $a^{2}$ +5ab+ $\frac{b^{2} }{4}$

3. That is your answer.

8 0

3 years ago

Solve the equation 3 - 2x = 9 a) x = 3 b)x = -3 c) x = 6 d) x = -6

Elza [17]

Answer:

Option B is correct ...

 $solution \\ 3 - 2x = 9 \\ or \: - 2x = 9 - 3 \\ or \: - 2x = 6 \\ or \: x = \frac{6}{ - 2} \\ x = - 3$ 

hope this helps..

Good luck on your assignment...

3 0

3 years ago

Read 2 more answers

In a recipe for fizzy grape juice, the ratio of cups of sparkling water to cups of grape juice concentrate is 3 to 1. a) Find tw

Verizon [17]

Answer:

$6:2,\,9:3$

Step-by-step explanation:

Given: The ratio of cups of sparkling water to cups of grape juice concentrate is $3:1$ in a recipe for fizzy grape juice.

To find: two more ratios of cups of sparkling water to cups of juice concentrate that would make a mixture that tastes the same as this recipe

Solution:

Equivalent ratios are the ratios that have the same value.

Find two ratios equivalent to $3:1=\frac{3}{1}$

Multiply both numerator and denominator of $\frac{3}{1}$ by 2

$\frac{3(2)}{1(2)} =\frac{6}{2}$

Multiply both numerator and denominator of $\frac{3}{1}$ by 3

$\frac{3(3)}{1(3)} =\frac{9}{3}$

So, two more ratios of cups of sparkling water to cups of juice concentrate that would make a mixture that tastes the same as this recipe are $6:2,\,9:3$

3 0

3 years ago

Solve for x in equation x-c/2=d

lana66690 [7]

X-c/2 = d
Multiply by 2 on both sides. Leaves us with:
x-c = 2d
Add 2 to both sides. Leaves us with:
x = 2d + c
Unless you have values to substitute into the variables, this is your answer:
x = 2d + c

4 0

3 years ago