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3 years ago

In the figure below, p ||q. find m 7 if m 8=116°

Mathematics

2 answers:

Alex Ar [27]3 years ago

7 0

Answer:

180-116=64

Step-by-step explanation:

Angles sums should be 180 since it is straight angle

Serjik [45]3 years ago

3 0

Answer:

m∠7 = 64°

Step-by-step explanation:

∠7 and ∠8 are supplementary meaning they add up to 180°.

m∠7 + m∠8 = 180°

m∠7 + 116° = 180°

m∠7 = 64°

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1.7 m+ 3.7 m +3.7 m +3 m +5.9 m

FinnZ [79.3K]

answer:

18 m

step-by-step explanation:

simply add up all the numbers given
1.7 + 3.7 + 3.7 + 3 + 5.9 = 18
then, put the units given

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3 years ago

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Why is the opposite of a negative number a positive number?

andreev551 [17]

I don't really know how to explain but another example would be the opposite of multiplying is dividing.

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3 years ago

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let a(x) be the amount of money remaining on hilarys gift card after purchasing x apps on her phone since a(12) = ??? , hilary w

mezya [45]

Answer:

Step-by-step explanation:

Given ⇒⇒⇒ a(x)=50-1.25x

a(x) be the amount of money remaining on Hillary's gift card.

x number of apps purchased on her phone

∴ a(12) = 50 - 1.25 * 12 = 35

Which mean : She have amount of total money = 50

she purchased 12 apps costs 12 *1.25 = 15 . So , she spent 15

The remaining on Hillary's gift card = 50 - 15 = 35

The correct answer is :

a(12) =35 .

This means that purchasing 12 apps , Hillary has $35 left

7 0

3 years ago

SEE QUESTION IN IMAGE

r-ruslan [8.4K]

d.30

Answer:

Solution given:

x. $\:\:\:$ f. $\:\:\:$ fx

13. $\:\:\:$ 15. $\:\:\:$ 195

14. $\:\:\:$ 42 $\:\:\:$ 588

15. $\:\:\:$ x. $\:\:\:$ 15x

16. $\:\:\:$ 10. $\:\:\:$ 160

17. $\:\:\:$ 3. $\:\:\:$ 51

. n=70+x. $\sum$ =994+15x

we have

mean=sum/n

14.44= $\bold{\frac{\sum}{n}}$

14.44= $\bold{\frac{994+15x}{70+x}}$

doing crisscrossed multiplication

(70+x)*14.44=994+15x

1010.8+14.44x=994+15x

15x-14.44x=1010.8-994

0.56x=16.8

x=16.8/0.56

x=30

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3 years ago

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The element plutonium-239 is highly radioactive. Nuclear reactors

Dominik [7]

Answer:

$2.84\cdot 10^{-5} y^{-1}$

Step-by-step explanation:

The decay rate of a radioactive isotope (also called activity of the isotope) is given by:

$r=k N$

where

r is the decay rate

k is the decay constant

N is the number of nuclei in the radioactive sample

The decay constant of a radioactive isotope is also related to the half-life of the isotope by the formula

$k=\frac{ln2}{t_{1/2}}$

where

$t_{1/2}$ is the half-life of the isotope, which is the time taken for the sample to halve, compared to its initial amount

In this problem, the half-life of plutioniun-239 is

$t_{1/2}=24,360 y$

Therefore, the k-factor (decay constant) is:

$k=\frac{ln 2}{24,360}=2.84\cdot 10^{-5} y^{-1}$

7 0

3 years ago