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kirill115 [55]
3 years ago
11

_____ 20. Brandon needs $480 to buy a TV and stereo system for his room. He received $60 in cash for birthday presents. He plans

to save $30 per week from his part-time job. To find how many weeks w it will take to have $480, solve 60 + 30w = 480. Type your answer in the blank to the left. A. 16 weeks B. 13 weeks C. 15 weeks D. 14 weeks
Mathematics
2 answers:
Anit [1.1K]3 years ago
6 0
In order to solve the equation, we must simplify for w.
Original: 60 + 30w = 480

30w = 480 - 60
30w = 420
w = 420/30
w = 14

Therefore the correct answer is D. 14 weeks.
Hope this helps!
oee [108]3 years ago
6 0
The answer is D. weeks
 easy ways to check is by:
Birthday cash:$60
weekly saved: $30 
so 480- 60= 420 
and if you multiply 30 by 14 equal= 420 
Remember there are hundreds different ways to find the right answer for math
and i use this method cause i was running out of time to answer it. hope this 

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For each equation given below, write ONE related equation. a) x + 5 = 18 b) 66x =330
GenaCL600 [577]

Answer:

x = 13 ; x = 5

Step-by-step explanation:

The easiest related equation to get is simply solving for x:

a) x + 5 = 18

Isolate the variable, x. Note the equal sign, what you do to one side, you do to the other. Subtract 5 from both sides:

x + 5 (-5) = 18 (-5)

x = 18 - 5

x = 13*

b) 66x = 330

Isolate the variable, x. Divide 66 from both sides of the equation:

(66x)/66 = (330)/66

x = 330/66

x = 5*

*Note: An equation simply is a expression that has an equal sign. This means that as long as there is an equal sign, it counts as an equation.

~

4 0
3 years ago
What do you get when u count out 40 dollars with quarters? <br><br><br>help me please ​
Rudiy27

Answer:

160 Quarters

Step-by-step explanation:

There are 4 quarters in a dollar, and we know that there are 40 dollars. Multiply 40 by 4 to get 160

<u>Hope this helps :-)</u>

3 0
2 years ago
QUADRATIC EQUATION â€" WORD PROBLEMS
dusya [7]

Answer: -7, 12

Step-by-step explanation:

a+b = 5

a*b = -84

a = 5-b

(5-b)*b = -84

-b^2 + 5b + 84 = 0

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The roots are -7 and 12.

I'm not sure what â€" stands for

4 0
2 years ago
How to do the substitution in math?
seraphim [82]

Substitution method can be applied in four steps

Step 1:

Solve one of the equations for either <span>x = </span>or y = .

Step 2:

Substitute the solution from step 1 into the other equation.

Step 3:

Solve this new equation.

Step 4:

Solve for the second variable.


hope this helps you!

4 0
3 years ago
Help me please asap I need to know fully how to solve this problem
vivado [14]
Consider the absolute value, because we only worry about the quadrant later.

\text{Consider: } sin(A) = |-\frac{\sqrt{3}}{4}|
sin(A) = \frac{\sqrt{3}}{4}

Thus, we know that the hypotenuse has a length of 4 units, and the side opposite the angle, A is √3, because this is the nature of the sine function in relation to its triangular component.

The missing side can be found using Pythagoras' Theorem:
4² - (√3)² = x²
16 - 3 = x²
13 = x²
x = √13

\therefore tan(A) = \pm \sqrt{\frac{3}{13}}

Since angle A is in the third quadrant, the tangent function will produce a positive angle.

tan(A) = \sqrt{\frac{3}{13}}
\text{Rationalise the denominator: } \frac{\sqrt{3}}{\sqrt{13}} \cdot \frac{\sqrt{13}}{\sqrt{13}}

tan(A) = \frac{\sqrt{39}}{13}
7 0
3 years ago
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