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4 years ago

Please answer this correctly I have to finish the sums by today as soon as possible

Mathematics

1 answer:

mamaluj [8]4 years ago

6 0

Answer:

The second model, and the amount of exhibits the aquarium has is 40.

Step-by-step explanation:

The model is an easy one to figure out, 36 is 90% of the exhibits, not 100%.

Now for the second part : 36 out of what is 90%? (what is the 100%?)

36 out of X is 90%

Equation: Y/X = P%

Solving our equation for X

X = Y/P%

X = 36/90%

Converting percent to decimal:

p = 90%/100 = 0.9

X = 36/0.9

X = 40

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Lane is 10 times Mel's age. If the difference in their age is 27, how old is Mel?

postnew [5]

L - Lane's age
m- Mel's age.
Lane is 10 times Mel's age, so 10m = l
difference in their age is 27 so l - m = 27
Substitute l = 10m and you'll have:
10m - m = 27
9m = 27 /:9
m=3
And l = 10m = 10*3 = 30

So Lane has 3 years old and Mel has 30 years old.

5 0

3 years ago

Which of the following sentences is true?

mezya [45]

Answer:

A the first one

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

Which set of steps can be used to prove the sine sum identity, sin(x + y) = sin(x)cos(y) + cos(x)sin(y)? Use the complementary r

Vilka [71]

Answer:

[A] use the complementary relationship between sine and cosine to rewrite sin(x + y) as cos(pi/2-(x+y)). apply the cosine sum identity. then simplify using sin(–y) = –sin(y) and cos(–y) = cos(y).

Step-by-step explanation:

i got it right

screw that other person l0l

note that sin(-x)=-sin(x) and cos(-x)=cos(x)

so sin(-y)=-sin(y) and cos(-y)=cos(y)

or something like that idfk

7 0

3 years ago

What is the slope of the line that passes through points (0,7) and (-3, 0)? O A Α. 7 ОВ. 7 O C. 13 OD 3

Luden [163]

Answer:

$m=\frac{7}{3}$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Slope Formula: $m=\frac{y_2-y_1}{x_2-x_1}$

Step-by-step explanation:

Step 1: Define

Point (0, 7)

Point (-3, 0)

Step 2: Find slope m

Simply plug in the 2 coordinates into the slope formula to find slope m

Substitute [SF]: $m=\frac{0-7}{-3-0}$
Subtract: $m=\frac{-7}{-3}$
Simplify: $m=\frac{7}{3}$

8 0

3 years ago

Kameron has 9 video games at his house. This is half as many games as Kevin has. Write an equation that demonstrates the relatio

Illusion [34]

Answer:

The answer is 18

Step-by-step explanation: Because 9 + 9 = 18 so therefore Kameron and Kevin has 27 video game in total :/

6 0

4 years ago