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3 years ago

9. A teacher places seven cards, lettered A-G, on

Mathematics

1 answer:

NNADVOKAT [17]3 years ago

3 0

Answer:

Cards C and E

Step-by-step explanation:

Remember that irrational numbers cannot be written as a fraction of two integers:

Is 10 irrational? No, because 10 can be written as a fraction (ex. 10/1, 20/2, etc.)

Is 6/5 irrational? No, because it is a fraction.

Is π irrational? Yes, because it can't be written as a fraction as its digits continue infinitely without repetition.

Is 11/4 irrational? No, because it is a fraction.

Is 8.25635... irrational? Yes, because the ellipsis shows the digits continue infinitely without repetition, otherwise there would be a bar over the digits to show repetition

Is -7 irrational? No, because it can be written as a fraction (ex. -7/1, -14/2, etc.)

Is 6.31(bar) irrational? No, because the bar shows that the digits 3 and 1 repeat.

Therefore, only cards C and E are irrational.

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Anyone know the answers to 26 and 28?Please help me I’m sleep deprived

vredina [299]

Answer:

26. 30 ≥ 7.5a + 4.5s 28. $22.50

Step-by-step explanation:

26. The family doesn't want to spend over 30 dollars, so when writing the inequality the amount they spend needs to be less than or equal to 30, hence the greater than/equal to sign. When writing the expression a - amount of adults & s - amount of students.

*remember in the question it states middle and high schoolers both count as students

The 7.5 is cost for adults and the 4.5 is cost for students.

28. You can use the expression created in 26

7.5a + 4.5s

Then substitute in the amount of people into their respective categories.

7.5(2) + 4.5(3) = 22.50

7 0

3 years ago

maks197457 [2]

Answer:

A. 3:7

Step-by-step explanation:

The volume of the smaller cube is 216 m³.

The volume of the larger cube is 2744 m³

Let the similarity ratio be $l:L$

The volume of these two cubes are in the ratio:

$l^3:L^3=216:2744$

This implies that:

$(\frac{l}{L})^3 =\frac{216}{2744}$

We take the cube root of both sides to obtain:

$\frac{l}{L} =\sqrt[3]{\frac{216}{2744}}$

$\frac{l}{L} =\frac{6}{14}$

This simplifies to:

$\frac{l}{L} =\frac{3}{7}$

Therefore the ratio is 3:7

6 0

3 years ago

Urgent help need it plz

Tatiana [17]

Answer:

angle 1 = 51

angle 2 = 34

angle 3 = 95

angle 4 = 38

angle 5 = 47

angle 6 = 74

angle 7 = 59

Step-by-step explanation:

a straight line is 180 degree, so to find angle 1, subtract 129 by 180.

angle 2 is found by adding angle 1 and 95 then subtract that by 180.

angle 3 and 95 are opposite angles, so they are the same

for angle 4, add angle three and 47 then subtract that by 180

angle 5 is 47, they are opposite

angle 7, subtract 121 by 180

angle 6, you add angle 5 and 7, and subtract that by 180

4 0

3 years ago

Read 2 more answers

9,874 × 48 - 243 ÷ 5 × 2

Elenna [48]

473,854.8 you just have to go answering them from left to right

4 0

4 years ago

Read 2 more answers

Explain why the graph of the equation g(x) = -(x + 1 ) - 3 would be a parabola opening downward.

sashaice [31]

Answer: Because the a-value is negative.

<u>Step-by-step explanation:</u>

The vertex form of a quadratic equation is: y = a(x - h)² + k where

"a" is the vertical stretch
-a is a reflection over the x-axis
h is the horizontal shift (positive = right, negative = left)
k is the vertical shift (positive = up, negative = down)

Given: g(x) = - (x + 1)² - 3

↓

a= -1

Since the a-value is negative, the parabola will be reflected over the x-axis which will change the curve from (U-shaped) to (∩-shaped).

3 0

4 years ago