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2 years ago

When you multiply by an even number the product is even. true or false And why

Mathematics

2 answers:

denis23 [38]2 years ago

7 0

False what if the number could be negative

Oksana_A [137]2 years ago

3 0

True, any number multiplied by an even number is even

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Which of the exponential growth functions has a multiplicative rate of change of 4? 2 f(x) X x f(x) 1 f(x) - 1 NT -1 -1 2 1 4 8

tester [92]

Expondential growth is

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2 years ago

If the mean of 25, 28, a, 30 and 32 is 27, then find the value of a.

Anna11 [10]

Answer:

a = 20

Step-by-step explanation:

The mean is calculated as

mean = $\frac{sum}{count}$

= $\frac{25+28+a+30+32}{5}$ = $\frac{115+a}{5}$

Then

$\frac{115+a}{5}$ = 27 ( multiply both sides by 5 to clear the fraction )

115 + a = 135 ( subtract 115 from both sides )

a = 20

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3 years ago

The rockets scored 15 baskets out of 21 attempts. How many attempts will it take for the rockets to score 40 baskets?

andre [41]

I may not be correct but ok pretty sure it’s 56

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3 years ago

Read 2 more answers

A survey team is trying to estimate the height of a mountain above a level plain. From one point on the plain, they observe that

Alex73 [517]

Answer: 3528.25

Step-by-step explanation:Make a sideview sketch

you should have 2 triangles, one right-angled containing the height and a scalene triangle with angles 24° , 153° (the supplement of 27°) and 3°

the side opposite the 3° angle is 1000

by let the side opposite the 24° be x, (also the hypotenuse of the right-angled triangle)

x/sin24 = 1000/sin3

x = 1000sin24/sin3

let the height of the mountain be h

sin 27 = h/x

h = x sin27 = (1000sin24/sin3)(sin27)

= 3528.25

8 0

3 years ago

Find the sum and product of the roots. 2x^2 + 6x - 8 = 0

netineya [11]

Suppose you can factorize:

$ax^2+bx+c=a(x-r_1)(x-r_2)$

Then by expanding the right side, you have

$ax^2+bx+c=a(x^2-(r_1+r_2)x+r_1r_2)=ax^2-a(r_1+r_2)x+ar_1r_2$

which means in this case, you have to have

$\begin{cases}6=-2(r_1+r_2)\\-8=2r_1r_2\end{cases}\implies\begin{cases}r_1+r_2=-3\\r_1r_2=-4\end{cases}$

3 0

3 years ago