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
padilas [110]
3 years ago
11

Evaluate the expression 5xy+ -2xy+y^2 when x=4 and y=-5

Mathematics
2 answers:
Mariulka [41]3 years ago
7 0

Answer:

-35

Step-by-step explanation:

5(4)(-5) + -2(4)(-5) + (-5)²

= -100 + 40 + 25

= -35

aniked [119]3 years ago
4 0

Answer: -35

Step-by-step explanation:

5(4)(-5)+(-2)(4)(-5)+(-5)^2

-100+40+25

-35

You might be interested in
the marks in an examination for a Physics paper have normal distribution with mean μ and variance σ2 . 10% of the students obtai
Blababa [14]

Let X be the random variable for the number of marks a given student receives on the exam.

10% of students obtain more than 75 marks, so

P(X>75)=P\left(\dfrac{X-\mu}\sigma>\dfrac{75-\mu}\sigma\right)=P(Z>z_1)=0.10

where Z follows a standard normal distribution. The critical value for an upper-tail probability of 10% is

P(Z>z_1)=1-F_Z(z_1)=0.10\implies z_1=F_Z^{-1}(0.90)

where F_Z(z)=P(Z\le z) denotes the CDF of Z, and F_Z^{-1} denotes the inverse CDF. We have

z_1=F_Z^{-1}(0.90)\approx1.2816

Similarly, because 20% of students obtain less than 40 marks, we have

P(X

so that

P(Z

Then \mu,\sigma are such that

\dfrac{75-\mu}\sigma\approx1.2816\implies75\approx\mu+1.2816\sigma

\dfrac{40-\mu}\sigma\approx-0.8416\implies40\approx\mu-0.8416\sigma

and we find

\mu\approx53.8739,\sigma\approx16.4848

3 0
4 years ago
Need help quick please
valina [46]

Answer:

Disagree

Step-by-step explanation:

Remember rotating 90 degrees  means (y,-x)

A= (1,2)

A'= (2,-1)

So it is disagreed.

Hope this help :)

3 0
3 years ago
Read 2 more answers
A girl’s club held a fundraiser last year and raised $600 for the local soup kitchen. This year they raised $960. What is the pe
KatRina [158]
960-600 = $360

360/600 x 100%
6 / 10 x 100%
60%
5 0
3 years ago
What is the answer of this problem
Goshia [24]

second answer to the left


3 0
3 years ago
Explain how modeling partial products can be used to find the products of greater numbers ?
liq [111]

You can break large numbers into a sum of a multiple(s) of 10 and the last digit of the number. For example, you can break 26 as 20+6, or 157 as 100+50+7.

Then, using the distributive property, you can turn the original multiplication into a sum of easier multiplications. For example, suppose we want to multiply 26 and 37. This is quite challenging to do in your mind, but you can break the numbers as we said above:

26\times 37=(20+6)(30+7) = 20\times 30+20\times 7+30\times 6+6\times 7

All these multiplications are rather easy, because they either involve multiples of 10 of single-digit numbers:

20\times 30+20\times 7+30\times 6+6\times 7 = 600+140+180+42=962

3 0
3 years ago
Other questions:
  • The accompanying data are lengths (inches) of bears. Find the percentile corresponding to 65.5 in.
    8·1 answer
  • Each of 25 students in Group A read for 45 minutes each of 21 students in Group B read for 48 minutes Which group read for more
    5·2 answers
  • What are the x-intercepts of the quadratic function? f(x)=x^2+6x−27
    13·2 answers
  • The sum of two consecutive integers is 123 what’s is the smallest of the two integers
    12·1 answer
  • II NEED THIS ASAP WILL GIVE BRAINLIEST Which number line correctly shows –3 – 1.5? A number line going from negative 4.5 to posi
    14·2 answers
  • How do I do this 16-3p=34 because i get the wrong answer
    13·2 answers
  • What are the next two numbers in this pattern?<br> 3, 6, 12, 24, . . .
    6·1 answer
  • In the figure, lines m and n are parallel. What is the value of y? a.42 b.48 c.132 d.138
    6·2 answers
  • Please help with explanation.
    6·1 answer
  • What is the A value in the quadratic: X^2+3x-2* ​
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!