MATHEMATICS HIGH SCHOOL

. A recipe calls for 3 teaspoons of salt for every 5 cups of flour. If you wanted to make a larger batch with 15 cups of flour, how much salt would you need? A. 5 teaspoons B. 10 teaspoons C. 9 teaspoons D. 6 teaspoons

Answers

Answer 1
Answer: Given:
3 teaspoons of salt for every 5 cups of flour.

How much salt is needed for 15 cups of flour?

This is a proportion problem:
a/b = c/d where ad = bc

3/5 = x/15
3*15 = 5x
45 = 5x
45/5 = x
9 = x

C. 9 teaspoons of salt is needed for 15 cups of flour.

3/5 = 9/15
3*15 = 5*9
45 = 45

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What is the chemical formula for copper(ll) sulfate?A) CuSO4
B) Cu2SO4
C) CuS
D) Cu2S
[help pls]

Answers

It should be A, CuSO4

How to solve this equation
8(4-x)= 7x+2

Answers

8 ( 4 - x ) = 7x + 2
32 - 8x = 7x + 2
      -7x     -7x
--------------------------
32 - 15x = 2
-32           -32
----------------------------
-15x = -30
/-15      /-15

x = 2.
8(4-x)=7x+2
32-8x=7x+2
-8x-7x=2-32
-15x=-30
x=-30:(-15)
x=2
answer:x= 2 

Twice a certain number is 44. What is the number?
equation:
n=

Answers

2n = 44
n = 22 (Divide by 2)

Hope I helped.
equation: n = 2n = 44
To work this out, do the opposite of multiplication on both sides of the equation.
This means: 
2n/2 = 44/2

^ a rule is, what you do to one side, you must do to the other. 

This leaves you with n = 22. 

PLEASE HELP ASAP!!!!!!!

Answers

the answer is 8, that line is 180° and we know 140. 180-140=40 and it’s 5x so that leaves us with 5x=40. divide 5 on both sides leaving 8

B
15
C
А.
Find the length of "a"using
the Pythagorean Theorem.

Answers

Answer:

a = 12

General Formulas and Concepts:

Pre-Algebra

  • Order of Operations: BPEMDAS
  • Equality Properties

Trigonometry

[Right Triangles Only] Pythagorean Theorem: a² + b² = c²

  • a is a leg
  • b is another leg
  • c is the hypotenuse

Step-by-step explanation:

Step 1: Identify

We are given a right triangle. We can use PT to solve for the missing length a.

Step 2: Define

hypotenuse c = 15

leg b = 9

leg a = ?

Step 3: Find missing length a

  1. Substitute in variables:                    a² + 9² = 15²
  2. Isolate a term:                                  a² = 15² - 9²
  3. Exponents:                                       a² = 225 - 81
  4. Subtract:                                           a² = 144
  5. Isolate a:                                           a = ±12

Since we are not dealing with a quadrant triangle, we can disregard the negative root of the quadratic.

∴ a = 12 is our final answer.

Round 0.428 to the nearest tenth

Answers

Answer:

.400

Step-by-step explanation:
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PLEASE HELP ITS DUE TMR