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3 years ago

A school assembly had 30 students in attendance, and 20% of them were first-graders. How

Mathematics

2 answers:

Natasha2012 [34]3 years ago

7 0

Answer:

6 First graders

Step-by-step explanation:

30×20%=30×.2

30×.2= 6

Ratling [72]3 years ago

5 0

Answer:

Step-by-step explanation:

If a school assembly had 30 students in attendance, and 20% of them were first-graders, there were 6 first-graders at the assembly.

20% of 30 = 6

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The perimeters of the triangles shown are equal. Find the side lengths of each triangle.

vredina [299]

Answer:

x = 14

AB = 37

BC = 36

AC = 28

PQ = 28

QR = 28

PR = 45

Step-by-step explanation:

we can add together the sides of ΔABC and set it equal to the sum of the sides of ΔPQR

2x+9 + 2x+8 + 2x = 2x + 2x + 3x+3

combine 'like terms':

6x + 17 = 7x + 3

subtract 6x from each side to get:

17 = x + 3

subtract 3 from each side to get:

14 = x

CHECK:

Does 6(14) + 17 equal 7(14) + 3?

84+17 = 98+3

101 = 101 checks out correctly

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2 years ago

What is the value of x? 6(-3 - 2) - 2x = 14 Enter your answer in the box

Kitty [74]

Answer:X=-4

Step-by-step explanation:

8 0

4 years ago

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A washer and dryer cost $918 combined . The washer cost $68 more than the dryer . What's is the cost of the dryer ?

atroni [7]

The answer is 850! You subtract 918 and 68 to get your answer. To check it you just add 68 to 850. Good luck!

7 0

3 years ago

HURRY ILL GIVE BRAINLIEST!!!

Free_Kalibri [48]

ANSWER

D) (a + 1, b + m)

EXPLANATION

The given line passes through (a,b) and has slope m.

The equation is:

$y - b = m(x - a)$

When x=a+1, we obtain

$y - b = m(a + 1 - a)$

This

$y = m( 1 ) + b$

$y = m + b$

Therefore,(a + 1, b + m) must also lie on this line.

The correct answer is D.

3 0

3 years ago

Which is the slope of the line that passes through the points (4, 2) and (6, 7)?

denis23 [38]

Answer:

$\displaystyle m = 5$

General Formulas and Concepts:

Pre-Algebra

Evaluations

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Algebra I

Coordinate Planes

Coordinate (x, y)

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

Step-by-step explanation:

Step 1: Define

Identify variables.

Point (4, 2)

Point (6, 7)

Step 2: Find slope m

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

Substitute in points [Slope Formula]: $\displaystyle m = \frac{7 - 2}{6 - 4}$
[Evaluations] Simplify: $\displaystyle m = \frac{5}{1}$
[Evaluations] Simplify: $\displaystyle m = 5$

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3 years ago

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