-x-5y=22&y=-7x+16 solve the system by the substitution method

Kwame's team will make two triangular pyramids to decorate the entrance to the exhibit. They will be wrapped in the same metalli

Veseljchak [2.6K]

Answer:

Kwame's team will save = 7.8 $\times$ $0.24 = $1.87

Step-by-step explanation:

i.) Let the side of the equilateral triangle base be a

ii.) the area of the base = 3.9 square feet

iii.) the area of equilateral triangle is = $\frac{\sqrt{3} }{4} a^{2}$ = 3.9

iv.) Base area = 3.9 square feet

v.) The area that is not covered is the base.

vi.) The total area that is not covered = 3.9 $\times$ 2 since there are two pyramids

therefore the total area not covered = 7.8 square feet

vii.) therefore Kwame's team will save = 7.8 $\times$ $0.24 = $1.87

8 0

4 years ago

(4,0) (3,-1) (6,3) (2,-4) which are solutions to y=x-4 select all that apply

beks73 [17]

Just a matter of subbing in ur points to see which ones are true.

y = x - 4

solutions are : (4,0), (3,-1)

8 0

3 years ago

Which of the following statements are true? Select all that apply.

Tom [10]

Answer: The statements in options 2 and 4 are true.

Explanation:

The LCM of two numbers is the smallest number that is multiple of both numbers.

The factor of 8 and 12 are,

$8=2\times 2\times 2$

$12=2\times 2\times 3$

Since 2 and 2 are common in both but 2 and 3 are not same, therefore the L.C.M. of 8 and 12 is,

$L.C.M.(8,12)=2\times 2\times 2\times 3=24$

Therefore the statement in option 1 is incorrect.

The factor of 6 and 9 are,

$6=2\times 3$

$9=3\times 3$

Since 3 is common in both but 2 and 3 are not same, therefore the L.C.M. of 6 and 9 is,

$L.C.M.(6,9)=2\times 3\times 3=18$

Therefore the statement in option 2 is correct.

The factor of 11 and 4 are,

$11=1\times 11$

$4=2\times 2$

Since all factor are different, therefore the L.C.M. of 11 and 4 is,

$L.C.M.(11,4)=1\times 11\times 2\times 2=44$

Therefore the statement in option 3 is incorrect.

The factor of 9 and 10 are,

$9=1\times 9$

$10=2\times 5$

Since all factor are different, therefore the L.C.M. of 9 and 10 is,

$L.C.M.(9,10)=1\times 9\times 2\times 5=90$

Therefore the statement in option 4 is correct.

4 0

3 years ago

Help please I need an answer

adoni [48]

The answer is the first one. the others are wildly outrageous lol.

V= 25,000 and we are considering the value decreasing after each year by 25% which is .25. 18,750 is the best answer out of all the wild ones lol.

7 0

3 years ago

Is negative 12/7 irrational or rational

torisob [31]

Ok, think about it. What’s the definition of a irrational number? Can the number be converted to a fraction or be able to be turned into a decimal that repeats or terminates? If so your looking at a rational number. If it can’t be turned into a fraction or become a repeating or terminating decimal then your number is likely a irrational number. Hope this helps. And your number is a rational number.

6 0

3 years ago