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
VashaNatasha [74]
3 years ago
13

What is (-2)(-5)? Dhdjfhfhhdhd

Mathematics
1 answer:
lbvjy [14]3 years ago
6 0

Answer:

( - 2)( - 5) \\  - 2 \times  - 5 \\   = - 10

<h2><u>please</u><u> mark</u><u> me</u><u> </u><u>brainliest</u></h2>
You might be interested in
12 inches to millimeters
gogolik [260]
The answer is 304.8 millimetres
3 0
3 years ago
Read 2 more answers
The heights of the trees in a forest are normally distributed, with a mean of 25 meters and a standard deviation of 6 meters. Wh
Alla [95]

Answer:

2.3%

Step-by-step explanation:

The formula to convert x into z distribution is

z=\frac{x-\mu}{\sigma}

Where z is the test statistic

x is what we are looking for (in this case 37)

\mu is the mean (in this case, it is 25)

\sigma is the standard deviation (we have 6)

<em>Plugging these into the formula, we get:</em>

z=\frac{x-\mu}{\sigma}\\z=\frac{37-25}{6}\\z=2

Thus we can say we want P(z\geq 2)

<u>Note: </u> P(z\geq a)=1-P(z\leq a)

The table given is for any  z where P(z\leq a)

Thus, now we have:

P(z\geq 2)\\=1-P(z\leq 2)\\=1-0.9772\\=0.0228\\

0.0228 into percentage is 0.0228 * 100 = 2.28%

Rounded, we get 2.3%

Third answer choice is right.

3 0
3 years ago
Perchlorate is a chemical used in rocket fuel. People who live near a former rocket-testing site are concerned that perchlorate
ser-zykov [4K]

Answer:

H_1 : \mu  > 24.5

Step-by-step explanation:

From the given information:

The sample size is 28

The population mean is 24.5 (ppb)

The sample mean is 225.3 (ppb)

Thus, the null and the alternative hypothesis can be computed as:

Null hypothesis:

H_o : \mu \le 24.5

Alternative hypothesis:

H_1 : \mu  > 24.5

8 0
3 years ago
What is the completely factored form of the following expression<br> 6b2+5b-4
nlexa [21]
The answer is (2b+1)(3b-4)
3 0
3 years ago
1)Find the angle of elevation of the sun from the ground when a tree that is
KIM [24]

Answer:

\theta=41.18^{\circ}

Step-by-step explanation:

Given that,

The height of the tree, h = 14 ft

The height of the shadow, b = 16 ft

We need to find the angle of elevation of the sun from the ground. Let the angle be θ. We can use trigonometry to find it. So,

\tan\theta=\dfrac{P}{B}\\\\\tan\theta=\dfrac{14}{16}\\\\\theta=41.18^{\circ}

So, the required angle of elevation of the sun is equal to 41.18^{\circ}.

7 0
3 years ago
Other questions:
  • What is the solution to 3(x-1) -2(2x +1)= 8(x-1)
    8·1 answer
  • I need help graphing
    8·1 answer
  • The surface area of a cube is 1,350 m2. Find the volume of the cube.​
    8·1 answer
  • The question: how old am I if 400 reduced by 2 times my age is 352?
    8·1 answer
  • Two trains leave from the same station at the same time and travel in opposite directions. One train
    15·1 answer
  • I will give brainliest to whoever answers this correctly
    7·2 answers
  • Help needed ASAP it’s geometry
    13·1 answer
  • A taxi service charges a $1.95 flat rate plus $0.55 per mile. Jason only has $12 to spend on a ride. Which graph best represents
    7·1 answer
  • Activity which odd number comes immedediatly before 87?​
    9·1 answer
  • 9) Write the equation of the given line in slope-intercept form:
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!