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3 years ago

Help me catch up in Geometry? Thanks

Mathematics

1 answer:

tekilochka [14]3 years ago

4 0

Attached the solution and work.

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A) Calculate the area of a triangle that has base 8cm and height

Bas_tet [7]

Answer:

26cm^2

Step-by-step explanation:

Base = 8cm

Height = 6.5cm

$a = \frac{base \: cm \times heightcm}{2}$

Substitute values into the given equation

$Area = \frac{8 \: cm \times 6.5 \: cm \: }{2} \\ = \frac{52 {cm}^{2} }{?} \\ = 26 \: {cm}^{2}$

7 0

3 years ago

Read 2 more answers

5x-y=12 ............................

Eva8 [605]

5x−y=12 Subtract 5x from both sides of the equation.

− y = 12 − 5 x Divide each term in

− y = 12 − 5 x by - 1 and simplify

y = - 12 + 5 x

i don't know if thats what your answer was but there you go

3 0

3 years ago

Three-fifths of the students in a room are girls. One-third of the girls have blond hair. One-half of the boys have brown hair.

yan [13]

Answer:

a. Of all the students, $\frac{1}{5}$ are girls with blond hair.

b. Of all the students, $\frac{1}{5}$ are boys without brown hair.

Step-by-step explanation:

a. You know that $\frac{3}{5}$ of the students are girls (This means that $\frac{2}{5}$ of the studes are boys) and $\frac{1}{3}$ of these girls have blond hair.

Then, $\frac{1}{3}$ of $\frac{3}{5}$ is:

$(\frac{3}{5})(\frac{1}{3})=\frac{1}{5}$

Therefore, of all the students, $\frac{1}{5}$ are girls with blond hair.

b. You know that $\frac{1}{2}$ of the boys have brown hair.

Then, $\frac{1}{2}$ of $\frac{2}{5}$ is:

$(\frac{2}{5})(\frac{1}{2})=\frac{1}{5}$

Of all the students, $\frac{1}{5}$ are boys without brown hair.

8 0

3 years ago

Johanna has to solve the system of equations using substitution. She isolates x in the second equation. Which should be her next

olganol [36]

Answer: A) 3(10 - 5y) + 6y =12

Step-by-step explanation:

As per the question , the given system of linear equation :

$3x+6y=12---(i)\\\\ x+5y=10---(ii)$

Here , To solve the system of equations using substitution , Johanna isolates x in the second equation and writes

$x=10-5y$

As per the substitution method , the next step is to substitute the isolated value of 'x' in first equation , thus the next step will become

$3(10-5y)+6y=12$

Hence, the correct option is A) 3(10 - 5y) + 6y =12

6 0

4 years ago

Solve for q:2- 5/q=16

fredd [130]

2-5/q=16
-5/q =2=16
(-5)+qx2/q=16
q=-5/14

4 0

3 years ago