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lozanna [386]
3 years ago
14

4xsquared-3xy+9ysquared-3 (5xy+7ysquared)

Mathematics
1 answer:
Flauer [41]3 years ago
7 0
4x² - 3xy + 9y² - 3(5xy + 7y²)
4x² - 3xy + 9y² - 3(5xy) - 3(7y²)
4x² - 3xy + 9y² - 15xy - 21y²
4x² - 3xy - 15xy + 9y² - 21y²
4x² - 18xy - 12y²
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erin needs 9.75 cups of flour to make 6 + 1/2 dozen cookies. how many cups of flour does erin need to make 1 dozen cookies
Hitman42 [59]
Erin needs 1.5 cups of flour to make 1 dozen cookies.
6 0
3 years ago
Graph the line that passes through the points (6, -4) and (7, -4) and determine the equation of the line.
Fantom [35]

Answer:

the equation in slope intercept is y = -4.

ot your points and it is a straight line across..no slope.

8 0
3 years ago
PLEASEEEEE HELPPPP MEEEEEEE BRAINLIEST TO THE FIRST ANSWER AND 30 POINTS
icang [17]

Answer:

CD ≠ EF

Step-by-step explanation:

Using the distance formula

d = \sqrt{(x_{2}-x_{1})^2+(y_{2}-y_{1})^2    }

with (x₁, y₁ ) = C(- 2, 5) and (x₂, y₂ ) = D(- 1, 1)

CD = \sqrt{(-1+2)^2+(1-5)^2}

      = \sqrt{1^2+(-4)^2}

      = \sqrt{1+16} = \sqrt{17}

Repeat using (x₁, y₁ ) = E(- 4, - 3) and (x₂, y₂ ) = F(- 1, - 1)

EF = \sqrt{(- 1+4)^2+(-1+3)^2}

     = \sqrt{3^2+2^2}

     = \sqrt{9+4} = \sqrt{13}

Since \sqrt{17} ≈ \sqrt{13} , then CD and EF are not congruent

     

6 0
3 years ago
4. Ideal amount of children
Vaselesa [24]

Answer:

3

Step-by-step explanation:

Formula:

\frac{sum of all numbers added together}{total amount of numbers}

\frac{21}{7} = 3

3 0
2 years ago
Add −2/3+2 3/8 . Write your answer as a mixed number in simplest form.
d1i1m1o1n [39]

Answer:

41/24 or 1 17/24

Step-by-step explanation:

2 3/8=19/8

-2/3+19/8

-16/24+57/24

41/24

5 0
2 years ago
Read 2 more answers
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