3 years ago

PLZZZZ HELPPPP!!!!!! 12 POINTS!!!

Mathematics

1 answer:

Paha777 [63]3 years ago

4 0

Plug in each pair into each system of inequalities. And see which one fits

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What is x + 5 equals 10

Wittaler [7]

x+5= 10

move +5 to the other side

sign changes from +5 to -5

x+5-5= 10-5

x= 10-5

x= 5

Answer:

x= 5

7 0

3 years ago

A fisherman can row upstream at 5mph and downstream at 10mph he started rowing upstream until he got tired and then rowed downst

AlekseyPX

We have been given that the upstream speed is $5 mph$ and the down stream speed is $10mph$ .

Let the fisherman traveled a distance of x miles.

The total time of the trip is 6 hours.

Relations between speed (s), time (t) and distance (d) is $s = \frac{d}{t}$

Hence, $t= \frac{d}{s}$

Time upstream + time downstream = 6

$\frac{x}{5} +\frac{x}{10} =6$

lcm = 10

$\frac{2x+x}{10} =6$

=> $\frac{3x}{10} =6$

Cross multiplying, $3x= 60$

x = 20 miles .. Answer.

8 0

3 years ago

The grades of a science test are normally distributed. Thanh finds that his grade on the test has a z-score of –2.5. Which state

liraira [26]

From all those aforementioned, the true statement is: Thanh’s grade is 2.5 standard deviations below the mean of the test grades.

7 0

3 years ago

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If f(x) = -x^2 + 6x - 1 and g(x) = 3x^2 - 4x - 1, find (f + g)(x).

Alenkinab [10]

$f(x)=-x^2+6x-1 \\g(x)=3x^2-4x-1 \\f(x)+g(x)=-x^2+6x-1+3x^2-4x-1=\boxed{2x^2+2x-2}$

The answer is A.

Hope this helps.

r3t40

5 0

3 years ago

Solve for y. 4y+5/3 y-10/2 O y=-5 O y=-8 O y=-4

Naddika [18.5K]

not too sure but I think your answer would be -5

5 0

3 years ago

Read 2 more answers