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Llana [10]
3 years ago
7

PLEASE HELP I don't know how to do half of the stuff

Mathematics
1 answer:
Anit [1.1K]3 years ago
6 0
X-20/x+2y is 5-20/5+2(50)
15/5+100. 3+ 100=103
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Needs steps to solve the following a^2 + 7ab + 10b^2
jonny [76]
Factor : a^2 + 7ab + 10b^2 

In \ this \ case, a=1, b=7b \ and  \ c=10b^2. 

(a+2b)(a+5b)
7 0
3 years ago
A crew of loggers cleared 1/2 acre of lumber in 4 days. How long will it take the same crew to clear 2 3/4 acres of lumber?
krok68 [10]
Set up a proportion of acres to days. 1/2 acre is to 4 days as 2 3/4 acres is to x days.

x= # days to clear 2 3/4 acres
2 3/4 to improper fraction= 11/4

(1/2)/4 = (11/4)/x
cross multiply

(1/2 * x) = (4 * 11/4)
on the right, the 4 "cancels out"

1/2x= 11
divide both sides by 1/2

x= 11 ÷ 1/2
to divide fractions, multiply by reciprocal/inverse of 1/2

x= 11 * 2/1
x= 22 days

ANSWER: It would take 22 days to clear 2 3/4 acres.

Hope this helps! :)
6 0
4 years ago
Read 2 more answers
Use the standard normal table to find P(z ≥ 1. 4). Round to the nearest percent. %.
Oduvanchick [21]

The probability for the z-score is greater than or equal to 1.4 is 0.08076 or 8.076 %.

<h3>What is a z-score?</h3>

The z-score is a numerical measurement used in statistics of the value's relationship to the mean of a group of values, measured in terms of standards from the mean.

The probability for the z-score is greater than or equal to 1.4 is given as

P(z ≥ 1.4) = 1 - P( z < 1.4}

P(z ≥ 1.4) = 1 - 0.91924

P(z ≥ 1.4) = 0.08076

P(z ≥ 1.4) = 8.076 %

More about the z-score link is given below.

brainly.com/question/13299273

3 0
2 years ago
Which equation combines with the given equation to form a system of equations with the solution x = 3 and y = 9?
Alex73 [517]
Subsitute in all to see which ones have tthose solutions
subsitute 3 for x and 9 for y

A works
B is false
C is false
D is true
E is false
F is false

answer is A and D
4 0
3 years ago
Read 2 more answers
A.
Sophie [7]

Answer:

B.

Step-by-step explanation:

I graphed it but you could also use the y intercept to determine which function matches the graph

log(x+1)<u>+3</u>

the +3 at the end of the function makes the y-intercept positive 3

4 0
3 years ago
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