MATHEMATICS HIGH SCHOOL

What is 10 - 3.587can Someone pls explain this to me and show me the work

Answers

Answer 1
Answer:

Answer: 6.413

Step-by-step explanation:

What is 10 - 3.587?

This is subtraction of decimals. To subtract decimals, you can follow these steps:

• Write down the numbers given with the bigger number on top of the lower number.

• Add zeros after the decimals so the numbers will both have same length.

• Then subtract.

Therefore, 10 - 3.587 will be:

= 10.000 - 3.587

= 6.413

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Carlos is three times as old his son. The sum of Carlos age and his sons age is 52. How old is Carlo
Solve for x. Round to the nearest tenth, if necessary.
Simplify the following expression. 4a^-2bA.) b/4a^2B.)4b/a^2C.)1/4a^b2
Use completing the square to solve (x – 12)(x + 4) = 9 for x. x = –1 or 15 x = 1 or 7

Solve equation using square root property
X2-8X+16=1

Answers

x^2-8x+16=1\\ \\x^2-8x+16-1=0\\ \\x^2-8x+15=0\\ \\\Delta = b^{2}-4ac =  (-8)^{2}-4*1*15=64-60=4  \\ \\x_{1}=\frac{-b-\sqrt{\Delta }}{2a} =\frac{8- \sqrt{4}}{2}=\frac{8-2}{2}= \frac{6}{2}=3\\ \\x_{2}=\frac{-b+\sqrt{\Delta }}{2a} =\frac{8+ \sqrt{4}}{2}=\frac{8+2}{2}= \frac{10}{2}=5\\ \\Answer : x=3 \ \ or \ \ x = 5

What is the value of x if 3ax - 4x equals 15a -20?

Answers

Step-by-step explanation:

3ax - 4x = 15a - 20

x(3a - 4) = 15a - 20

so,

x × 3a = 15a

x × 3 = 15

x = 15/3 = 5

x × -4 = -20

x = -20/-4 = 5

since both terms have the same solution, it is the solution for the whole equation :

x = 5

You have been asked to build a scale model of your school out of toothpicks. Imagine your school is 30 feet tall. Your scale is 1 ft:1.26 cm.If a toothpick is 6.3 cm tall, how many toothpicks tall will your model be?

The model will be
toothpicks tall.

Your mother is out of toothpicks, and suggests you use cotton swabs instead. You measure them, and they are 7.5 cm tall. How many cotton swabs tall will your model be? If necessary, round your answer to the nearest whole number.

The model will be approximately
cotton swabs tall.

Answers

Answer:

6 toothpicks

5 cotton swabs

Step-by-step explanation:

The height of your scale model is 30 feet * 1.26 cm/foot = 37.8 cm

You need 37.8 cm / 6.3 cm/toothpick = 6 toothpicks to build your model.

When using cotton swabs, the height of your model will be 37.8 cm / 7.5 cm/cotton swab = 5.04 cotton swabs.

Rounding to the nearest whole number, you will need 5 cotton swabs to build your model.

So the answer is:

6 toothpicks

5 cotton swabs

Mealworms are a healthy food for wild song birds. Adam buys a 3 oz container of mealworms for $7.35. Marco buys a 5 oz container for $13.50. Which container is the better deal? (Compare the unit rates or cost per 1 oz)

Answers

Answer: 5 oz

Step-by-step explanation:

you get more and for the price of 7.35 it’s not worth only getting three oz

What are the x-intercepts of the function f(x) = –2x2 – 3x + 20?

Answers

Is the second 2 in -2x2 suppose to be a 2x^2?

Answer:

so the answer(s) is(are) 2.5 and -4.

Step-by-step explanation:

The ordered pairs (1, 1), (2, 4), (3, 9), (4, 16), and (5, 25) represent a function. What is a rule that represents this function? A. y = x2 B. y = 2x C. y = x + 2 D. y = 2x

Answers

y=x^2 is the answer, so I think it might be A, you just forgot the carrot.
Hope this helps!
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