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
Elanso [62]
3 years ago
9

If a and b are negative, then a+b is also negative determine the truth value

Mathematics
1 answer:
Mashutka [201]3 years ago
5 0
False. Two negatives equal a positive. if you say don't do that (negative) and then say don't don't do that (negative) you have said to do it (positive). Truth value means true or false.
You might be interested in
49 more than the quotient of an unknown number and 12 is 53. What is the value of the unknown number?
nalin [4]
The unknown number is 48 using the equation: x ÷ 12 +49=53 subtract 49 from both sides and get x ÷ 12 = 4 multiplying by 12 on both side to get rid of the ÷12 and get the final answer of x=48.
6 0
3 years ago
4x-y-32<br> if x=-2 y=3 and z= -1
Radda [10]
The answer is 6 jus do it
6 0
3 years ago
Can someone help me solve this?
Dovator [93]

Answer:

5 felt pads.

7 cards.

Step-by-step explanation:

Remark

  • The total number of items is 12
  • So let the felt sheets be x
  • Let the cards = y

Equations and Solution

x + y = 12

Now the price is 7.75 that she has to pay for the 12 items. She wants to come back with 0 dollars.

0.5x + 0.75y = 7.75             Multiply this equation by 2

x + 1.5y = 15.50                    write the first equation underneath and subtract.

<u>x +    y =   12</u>

      .5y =  3                          Divide by 0.5

y = 3/0.5

y = 7

So she can get 7 cards.

x + y = 12

x + 7 = 12

x = 12 - 7

x = 5

So she can buy 5 felt pads.

8 0
3 years ago
Simplify the following fraction (9/16/1/4)-1/5
german

Answer: \frac{41}{20}

Step-by-step explanation:

The first step is to make the division of the fractions \frac{9}{16} and

\frac{1}{4}. To do this, you can flip the fraction \frac{1}{4} over and multiply the numerators and the denominators of the fractions. Then:

(\frac{\frac{9}{16}}{\frac{1}{4}})-\frac{1}{5}=(\frac{9}{16}*4)-\frac{1}{5}=\frac{36}{16}-\frac{1}{5}

Reduce the fraction \frac{36}{16}:

 =\frac{9}{4}-\frac{1}{5}

Now you can make the subtraction:  in this case the Least Common Denominator (LCD) will be the multiplication of the denominators.   Divide each denominator by the LCD and multiply this quotient by the corresponding numerator and then subtract the products. Therefore you get:

=\frac{45-4}{20}=\frac{41}{20}

6 0
3 years ago
In a study of government financial aid for college​ students, it becomes necessary to estimate the percentage of​ full-time coll
ICE Princess25 [194]

Answer:

a) n = 1037.

b) n = 1026.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of \pi, and a confidence level of 1-\alpha, we have the following confidence interval of proportions.

\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}

In which

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}

The margin of error is:

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

99% confidence level

So \alpha = 0.01, z is the value of Z that has a pvalue of 1 - \frac{0.01}{2} = 0.995, so Z = 2.575.

​(a) Assume that nothing is known about the percentage to be estimated.

We need to find n when M = 0.04.

We dont know the percentage to be estimated, so we use \pi = 0.5, which is when we are going to need the largest sample size.

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.04 = 2.575\sqrt{\frac{0.5*0.5}{n}}

0.04\sqrt{n} = 2.575*0.5

(\sqrt{n}) = \frac{2.575*0.5}{0.04}

(\sqrt{n})^{2} = (\frac{2.575*0.5}{0.04})^{2}

n = 1036.03

Rounding up

n = 1037.

(b) Assume prior studies have shown that about 55​% of​ full-time students earn​ bachelor's degrees in four years or less.

\pi = 0.55

So

M = z\sqrt{\frac{\pi(1-\pi)}{n}}

0.04 = 2.575\sqrt{\frac{0.55*0.45}{n}}

0.04\sqrt{n} = 2.575*\sqrt{0.55*0.45}

(\sqrt{n}) = \frac{2.575*\sqrt{0.55*0.45}}{0.04}

(\sqrt{n})^{2} = (\frac{2.575*\sqrt{0.55*0.45}}{0.04})^{2}

n = 1025.7

Rounding up

n = 1026.

6 0
3 years ago
Other questions:
  • Regardless of the algorithm being used, a search through an array is always performed:
    8·1 answer
  • HELP ASAP!! Use cross products to determine which are valid proportions.
    7·1 answer
  • What is 82 minus 63.9
    13·2 answers
  • What is 89/10 as a mixed number
    13·1 answer
  • Order the integers from least to greatest. 6,11,16,-8,-5
    10·2 answers
  • What is the value of the following expression: w^2 + 2 + 48 divided by 2z. If w = 5 and z = 8
    13·1 answer
  • A real estate agent received 5.7% commission for a house that sold for $250,000. How much was the agent's commission?
    6·2 answers
  • A science test, which is worth 100 points, consists of 24 questions. Each question is worth either 3 points or 5 points. If x is
    14·1 answer
  • Farid's friend can't eat wheat, so Farid is baking him a loaf of gluten-free raisin bread. He mixes the dough and leaves it in a
    7·1 answer
  • <img src="https://tex.z-dn.net/?f=%5Chuge%20%5Cdag%20%5Csf%7BAnswer%20%5C%3A%20it%7D" id="TexFormula1" title="\huge \dag \sf{Ans
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!