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3 years ago

Please help! ASAP, no bots.

Mathematics

1 answer:

harkovskaia [24]3 years ago

3 0

Answer:

perfect square (4x - 3)^2

Step-by-step explanation:

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On three examinations, you have grades of 85, 78, and 84. There is still a final examination, which counts as one grade In order

kirill [66]

Answer:

The average of the provided grades are 86.75

Step-by-step explanation:

Consider the provided information.

On three examinations, you have grades of 85, 78, and 84. In order to get an A your average must be at least 90.

In the last exam you get 100 marks now calculate the average by using the formula:

$\frac{\text{Sum of observations}}{\text{Number of observations}}$

$\frac{85+78+84+100}{5}$

$\frac{347}{5}$

$86.75$

86.75 is less than 90 so you will not get A.

The average of the provided grades are 86.75

6 0

4 years ago

Please? I need help here

Yuki888 [10]

Answer:

Step-by-step explanation:

If pair of ratios does form a true proportion then:

$a:b=c:d\to\dfrac{a}{b}=\dfrac{c}{d}\to ad=bc$

$A)\\\\8:14=20:35\to\dfrac{8}{14}=\dfrac{20}{35}\\\\(8)(35)=(14)(25)\\\\280=280\qquad\bold{TRUE}\\\\b)\\\\\dfrac{6}{10}=\dfrac{15}{25}\\\\(6)(25)=(10)(15)\\\\150=150\qquad\bold{TRUE}$

$c)\\\\\dfrac{9}{5}=\dfrac{27}{15}\\\\(9)(15)=(5)(27)\\\\135=135\qquad\bold{TRUE}\\\\d)\\\\12:15=30:50\to\dfrac{12}{15}=\dfrac{30}{50}\\\\(12)(50)=(15)(30)\\\\600=450\qquad\bold{FALSE}$

3 0

4 years ago

Can someone help me with this?!

NNADVOKAT [17]

Answer:

$\sqrt{0/9}$

Step-by-step explanation:

Have a good day :)

4 0

3 years ago

Find the missing length. Round to the nearest tenth, If necessary.

ziro4ka [17]

Using the formula a² + b² = c² but reversing it to c² - b² = x² where x replaces the a for comprehension reasons

so this is the formula
c² - b² = x²

insert the numbers on the triangle in the picture
21² - 8² = 377

since 377 is squared and not the side length, we need to square root it to find x
√377 = 19.4~

Answer: x = 19.4

8 0

4 years ago

Given a system of linear equations; explain your strategy for solving the system, show the math required to solve the problem, a

labwork [276]

The solution is (x, y) = (2, 3)

<em><u>Solution:</u></em>

<em><u>Given equations are:</u></em>

y = 3x - 3 ------- eqn 1

y = 2x - 1 ---------- eqn 2

We can solve the equations by substitution method

In eqn 1, we have y equals 3x - 3

If we substitute this in place of y in eqn 2, we can get value of "x"

Substitute eqn 1 in eqn 2

3x - 3 = 2x - 1

Move the variables to one side and constants to other side

3x - 2x = -1 + 3

Substitute x = 2 in eqn 1

y = 3(2) - 3

y = 6 - 3

Thus the solution is (x, y) = (2, 3)

4 0

4 years ago