3 years ago

HELP PLEASE!!!!

Mathematics

2 answers:

kvv77 [185]3 years ago

7 0

4.70 + 4.70

Answer is 9.40 liters of soap

olasank [31]3 years ago

7 0

9.40 liters of soap would be used

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An abstract sculpture in the form of a triangle has a base 21 meters and a height of 12 meters. Find the are of the triangle.

charle [14.2K]

The area of a triangle could be determined using the following formula
$\boxed{a= \frac{1}{2} \times b \times h}$

plug in the numbers
$a = \frac{1}{2} \times 21 \times 12$
$a = \frac{1}{2} \times 252$
$a= \frac{252}{2}$
a = 126

The area of the triangle is 126 square meters

8 0

2 years ago

Easy problem lots of points explain how to do it please

wlad13 [49]

Answer:

$y= -2+\frac{2}{3}x$

Step-by-step explanation:

Multiply both sides by 2

2x=3y+6

Move variable to the left-hand side and change its sing

-3y=6-2x

Divide both sides of the equation by -3

$y= -2+\frac{2}{3}x$

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3 years ago

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Rational numbers are _____ natural numbers.<br> A. Always<br> B. Sometimes<br> C. Never

ratelena [41]

I think it is
A. Always

8 0

2 years ago

3 girls share $680 in the ratio 9 : 7 : 4, show that adele receives $306

Korolek [52]

Answer:

=$306

Step-by-step explanation:

9/20*$680

4 0

3 years ago

Solve (x + 4)2 – 3(x + 4) – 3 = 0 using substitution. u = Select the solution(s) of the original equation.

bezimeni [28]

Answer:

$\dfrac{-5-\sqrt{21}}{2},\ \dfrac{-5+\sqrt{21}}{2}$

Step-by-step explanation:

For the equation $(x+4)^2-3(x+4)-3=0$ use the substitution $u=x+4.$ Then the equation will take look

$u^2-3u-3=0.$

Solve this quadratic equation:

$D=(-3)^2-4\cdot 1\cdot (-3)=9+12=21,\\ \\u_{1,2}=\dfrac{-(-3)\pm \sqrt{21}}{2}=\dfrac{3\pm\sqrt{21}}{2}.$

Thus,

$x+4=\dfrac{3-\sqrt{21}}{2}\text{ or }x+4=\dfrac{3+\sqrt{21}}{2},\\ \\x_1=\dfrac{3-\sqrt{21}}{2}-4=\dfrac{-5-\sqrt{21}}{2}\text{ or }x_2=\dfrac{3+\sqrt{21}}{2}-4=\dfrac{-5+\sqrt{21}}{2}.$

8 0

3 years ago

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