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3 years ago

Evaluate −8 + 10 × 4 ÷ (−2)

Mathematics

2 answers:

Naddika [18.5K]3 years ago

6 0

Answer:

-28

Step-by-step explanation:

well first u gotta use order of operations. So first u would do

10 x 4 which = 40

next u would hafta do 40 / -2 which = -20

and finally -20 + -8 =-28

hope this helped!!

mart [117]3 years ago

6 0

Answer:

-28

Step-by-step explanation:

−8 + 10 × 4 ÷ (−2)

PEMDAS

Multiply and divide from left to right

−8 + 40 ÷ (−2)

−8 + -20

Then add and subtract

-28

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Using the segment addition postulate, which is true? What is the measure of AngleDCF? Three lines extend from point C. The space

Flura [38]

Answer:

129

Step-by-step explanation:

If three lines CD, CE and CF extend from point C, then the following addition postulate is true;

<DCE + <ECF = <DCF

If the space between line C D and C E is 75 degrees, then <DCE = 75

If the space between lines C E and C F is 54, then <ECF = 54.

Substitute the given values into the expression above will give;

<DCF =<DCE + <ECF

<DCF = 75+54

<DCF = 129

Hence the measure of <DCF is 129°

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3 years ago

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iren2701 [21]

Taking over his thoughts is the answer

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2 years ago

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John’s father is 5 times older than John and John is twice as old as his sister Alice. In two years time, the sum of their ages

oksano4ka [1.4K]

Answer:

John’s age is 8 years

Step-by-step explanation:

Let

x -----> John’s father's age

y -----> John’s age

z -----> John’s sister's age

we know that

$x=5y$ -----> equation A

$y=2z$

$z=y/2$ -----> equation B

$(x+2)+(y+2)+(z+2)=58$

$x+y+z+6=58$

$x+y+z=52$ -----> equation C

Substitute equation A and equation B in equation C and solve for y

$5y+y+y/2=52$

Multiply by 2 both sides to remove the fraction

$10y+2y+y=104$

$13y=104$

$y=8$

<em>Find the value of x</em>

$x=5(8)=40$

<em>Find the value of z</em>

$z=8/2=4$

therefore

John’s father's age is 40 years

John’s age is 8 years

John’s sister's age is 4 years

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3 years ago

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Answer:

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Step-by-step explanation:

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2 years ago

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fredd [130]

Here you go!! It's always best to graph these questions, if you have graph paper near.
If not there are online graphing websites to use!! :))

ANSWER: Choice D (4th answer)

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3 years ago