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trasher [3.6K]
3 years ago
13

What is -8 -10 ÷ 2+8=?

Mathematics
1 answer:
jek_recluse [69]3 years ago
4 0

is 3

because like terms

-10/2=-5

-5+8=3

so, 3 is your answer

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On the Algebra test the number of students who got a grade A was three more than twice the number of students who got lower grad
svlad2 [7]
X= # students who got lower grades
2x+3= # students with grade A

STEP 1:
Add the two sets above equal to 24.

x + (2x + 3)= 24
combine like terms

3x + 3= 24
subtract 3 from both sides

3x= 21
divide both sides by 3

x= 7 (# students lower than A)


STEP 2:
substitute x value from step 1 to find # grade A students

=2x + 3
=2(7) + 3
=14 + 3
=17 (# grade A students)


CHECK:
x + (2x + 3)= 24
7 + 2(7) + 3= 24
7 + 14 + 3= 24
24= 24


ANSWER: There were 17 students with grade A.

Hope this helps! :)
4 0
3 years ago
(20×2)20+2)20×2)+20(+41+2=​
andrew-mc [135]

Answer:

123

Step-by-step explanation:

BODMAS

1.multiply 20 by 2

2.20 ×2

3. 40+22+40+20+43=123

3 0
3 years ago
World population is approximately upper p equals 6.4 left-parenthesis 1.0126 right-parenthesis superscript t, with upper p in bi
Leviafan [203]

Given equation is

P=6.4(1.0126)^t

It gives approx world population in billions for t years since 2004.


Answer(a):

Compare with growth formula P=a(b)^t, we get:

growth factor b = 1.0126

We know that if r is the percent rate of growth then

1+r=b

1+r=1.0126

r=0.0126

Hence the yearly percent rate of growth of the world population is 0.0126 or 1.26%.


Answer(b):

To find worlds population in 2004, plug t=0 because year is counted from 2004.

P=6.4(1.0126)^0 = 6.4*1 = 6.40

Hence answer is 6.40 billion.


To find worlds population in 2018, plug t=2018-2004=14 because year is counted from 2004.

P=6.4(1.0126)^{14} = 6.4*1.19160117479 = 7.62624751867

Hence answer is approx 7.63 billion.


Answer(c):

Average rate of change of the world population between 2004 and 2018 is given by:

\frac{P\left(Year_{2018}\right)-P\left(year_{2004}\right)}{2018-2004}

=\frac{P\left(14\right)-P\left(0\right)}{14-0}

=\frac{7.63-6.40}{14}

=0.0878571428571

Hence answer is approx 0.0878571428571 billion per year.

To convert it into millions, multiply by 1000

So we get 0.0878571428571*1000 = 87.8571428571

Which is approx 88 to the nearest integer

Hence final answer is approx 88 millions per year.

7 0
4 years ago
The graph of the invertible function f is shown on the grid below <br> What is the value of f^-1(6)
dolphi86 [110]

Given:

The graph of an invertible function f<em> </em>is given.

To find:

The value of f^{-1}(-3).

Solution:

We know that, if the graph of an invertible function f passes through the point (a,b), then the inverse function f^{-1} passes through the point (b,a).

From the given graph it is clear that the graph of the function f passes through the points (-5,-3).

So, the inverse function f^{-1} must be passes through the point (-3,-5).

Therefore, the value of inverse function is -5 at x=-3. So, the value of f^{-1}(-3) is -5.

8 0
3 years ago
If a bakery produces 520 fried pies during an 8 hour shift, what is the production rate per hour of fried pies?
MaRussiya [10]

Answer:

B

Step-by-step explanation: divide 520 by 8 and you get 65

5 0
3 years ago
Read 3 more answers
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