1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Nadya [2.5K]
3 years ago
10

7 * ( -15 ): por favor, es urgente):

Mathematics
1 answer:
Mademuasel [1]3 years ago
8 0

Answer: From what I understand you want me to do 7*(-15)??? and the answer to that is -105.

Step-by-step explanation: All you have to do is 7*-15  

You might be interested in
The school store sells Midville High T-shirts for $12 each and Midville High shorts for $9 a pair. One afternoon they sold a tot
Flura [38]

Answer:
There will be 22 pairs of shorts were sold at a price of $9 each.

5 0
2 years ago
What is the double of a hundred?
larisa86 [58]

Answer:

200

Step-by-step explanation:

100 * 2 = 200

8 0
3 years ago
Read 2 more answers
QUICK EASY 25 POINTS!!
MAVERICK [17]

Answer:

1. leave the radical symbol and don't try to convert it to a decimal form

2. The approximated value differs from the exact solution and doesn't give a true equation.

3. Depending on the case, if she needs a mathematical answer, the exact value should be used, but for more practical applications, the rounded decimal form would be more usable.

Step-by-step explanation:

The step by step solution to the equation:

4x^3=756\\x^3=\frac{756}{4} =189\\x=\sqrt[3]{189} \\x=\sqrt[3]{3^3*7} \\x=3*\sqrt[3]{7}

1.- Exact solution means that if in the final step when solving for x the value of  x^3 is not a perfect cube, one needs to leave it indicated as a radical expression (with the radical symbol).

in our case, the cubic root of 189 is not a perfect cube. The factor form of 189 is: 3^3*7, so there is a perfect cube factor (3^3), but the other factor (7) is a prime number. Therefore 3 can get out of the root, while 7 stays inside.

2.- The equation was solved above, in exact form. Now to solve it giving a decimal approximation, we use a calculator to find the cubic root of 7, which is an irrational number with infinite number of decimals, the first of which we type here: \sqrt[3]{7} = 1.91293118...

Therefore, the decimal approximation to the solving for x would be:

x=3*\sqrt[3]{7}=3*1,91293118...=5.73879...=5.74

Where we rounded to two decimals as requested.

When we replace the exact answer in the original expression, we get a perfect equality:

4*x^3=756\\4* (3\sqrt[3]{7} )^3=756\\4*3^3*(\sqrt[3]{7} )^3=756\\4*27*7=756\\\\756=756

While if we use the approximate answer, we get:

4*x^3=756\\\\4*(5.74)^3=756\\\\4*189.119224=756\\756.476896=756

which is NOT a true equality.

3.- I would stick with the idea of showing the exact answer as answer to the mathematical equation. but for a practical case (for example she needs to by some material as a result of her equation solving, it would be more practical to take the numerical approximation to the store, instead of a cubic root of a number.

7 0
3 years ago
The value of a new car decreases by about 15% in the first year. How much will a car be worth after one year if its initial valu
kicyunya [14]

Answer:

$12,750

Step-by-step explanation: when you do the math you get it your welcome my G

7 0
3 years ago
Which value makes the equation true?<br><br><br><br> □+0.34=2.34
Nataly [62]

Answer:

2.00

Step-by-step explanation:

let the empty box be the variable n. n+0.34=2.34

subtract .34 from both sides

n=2.00

8 0
2 years ago
Read 2 more answers
Other questions:
  • A scale drawing of a conference room has a length of 5 inches and a width of 0.5 inches. if the scale is 0.5 inches = 8 feet wha
    14·1 answer
  • generate and solve another division problem with the same quotient and remainder as the two problems below. Explain your strateg
    8·1 answer
  • 435 L = ______ KL So what do i put in the blank spot ?? i dont know how to do this
    14·2 answers
  • What is the volume of this object?
    9·1 answer
  • Can you solve this:<br><br> 8cos^2x=6sinx+3
    5·1 answer
  • HELPPPP!!!
    15·2 answers
  • If s(x) = x – 7 and t(x) = 4x2 – x + 3, which expression is equivalent to (ToS) (x)
    11·2 answers
  • Select all the pairs of like terms in the expression.
    15·2 answers
  • Last month you spent ​$40 on clothing. This month you spent ​120% of what you spent last month. Set up a proportion to model thi
    8·1 answer
  • Please help explanation if possible
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!