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3 years ago

Area of a triangle when b = 6 m and h=7 m

Mathematics

2 answers:

goldfiish [28.3K]3 years ago

4 0

Answer:

21 square units

Step-by-step explanation:

Triangle area is $\frac{b*h}{2}$

so, $\frac{6*7}{2} =\frac{42}{2} =21$

so, area is 21 square units

Alchen [17]3 years ago

3 0

Answer

Step-by-step explanation:

The area of a triangle is "triangle = BxH" Which in your case is 6x7

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(2x–y)²–(y+2)²-----------

lilavasa [31]

Answer:

4x² -4xy -4y -4

Step-by-step explanation:

$\boxed{ {a}^{2} - {b}^{2} = (a + b)(a - b)}$

In this case, a= 2x -y and b= y +2.

(2x -y)² -(y +2)²

= (2x -y +y +2)[2x -y -(y +2)]

= (2x +2)(2x -y -y -2)

= (2x +2)(2x -2y -2)

= 2x(2x) +2x(-2y) +2x(-2) +2(2x) +2(-2y) +2(-2) (expand)

= 4x² -4xy -4x +4x -4y -4

= 4x² -4xy -4y -4

Alternatively, start by expanding the brackets.

$\boxed{(a - b)^{2} = {a}^{2} - 2ab \: + {b}^{2} }$

$\boxed{(a + b)^{2} = {a}^{2} + 2ab \: + {b}^{2} }$

(2x -y)² -(y +2)²

= 4x² -4xy +y² -(y² +4y +4)

= 4x² -4xy +y² -y² -4y -4 (expand)

= 4x² -4xy -4y -4 (simplify)

3 0

3 years ago

Identify the percent of change as an increase or a decrease. 16 centimeters to 44.2 centimeters. Find the percent of change.

ra1l [238]

44.2-16=28.2
then you take 28.2/44.2=0.6380...
multiply that by 100 to get 63.8%

5 0

3 years ago

Read 2 more answers

Pls help me solve this

sammy [17]

Answer:

4 kg of sugar would contain $1.2 \times 10^9$ crystals.

Step-by-step explanation:

Given that 3kg of sugar contains 9 × 10⁸ crystals, let "x" represent the number of sugar crystals 4kg of sugar would contain.

Thus, set up a proportion as follows:

3 kg : 9 × 10⁸ = 4 kg : x

$\frac{3}{9 \times 10^8} = \frac{4}{x}$

Solve for x. Cross multiply.

$3 \times x = 9 \times 10^8 \times 4$

$3x = 36 \times 10^8$

$3x = 3.6 \times 10^9$

Divide both sides by 3

$\frac{3x}{3} = \frac{3.6 \times 10^9}{3}$

$x = 1.2 \times 10^9$

4 kg of sugar would contain $1.2 \times 10^9$ crystals.

5 0

3 years ago

The following double line graph represents the heights (in inches) of Lana and Sabrina over a period of seven years. For how man

Sveta_85 [38]

Answer:

5 inches babesss

Step-by-step explanation:

3 0

3 years ago

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For which pair of numbers is 4 a common factor.

dolphi86 [110]

Answer: 40 and 52

Step-by-step explanation:

$40 =4 \times 10, 52=4\times 13$ , so both 40 and 52 have a factor of 4.

6 0

2 years ago