MATHEMATICS HIGH SCHOOL

Please help me solve this​
please help me solve this​ - 1

Answers

Answer 1
Answer:

Answer:

C should be the correct answer

Step-by-step explanation:

forgive me if im wrong
Answer 2
Answer:

Answer:

a, b, c

(all but the last one)

Step-by-step explanation:

a+b+c=180 is true bcuz the sum of interior angles in a triangle is 180

rearrange a+b+c=180 into a+b=180-c

observe that 180-c equals d, so in the equation a+b=180-c replace 180-c with d.

a+b=d   so thats true

we already established that d=180-c  so thats true as well

and the last one is just not true

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Mike is three times as old as his little sister, Mary. In 4 years, he will be twice as old as Mary. How old is Mary?

Answers

x-the age of Mike
y-the age of his sister

x=3y

x+4=2(y+4)
3y+4=2y+8
3y-2y=8-4
y=4 years

x=3*4=12 years
Mary: x yrs old
Mike: 3x yrs old

In four yrs:

Mary: x+4 yrs old
Mike: 3x+4 yrs old

As the text of task:

3x+4=2(x+4)
3x+4=2x+8
3x-2x=8-4
x=4

Mary is 4 yrs old

In which part of a professional email should you try to brief but highly descriptive

Answers

The subject, so that the recipient knows what the email is about but only through a couple words

What is the value of cos A?

Answers

Answer:

cos(A)

= A/H

= 8/17
the  answer is  8/17 ........

Ebony walked at a rate of 3 1/2 miles per hour for 1 1/3 hours. how far did she walk?

Answers

Answer:

She walked 4(2)/(3) miles

Step-by-step explanation:

Speed of ebony = 3(1)/(2) miles/hour

                           = (7)/(2) miles/hour

Time Taken =1(1)/(3) hours.

                   =(4)/(3) hours.

We are supposed to find how far did she walk i.e. Distance

Formula : Distance = Speed * Time

Distance = (7)/(2) * (4)/(3)

Distance = (14)/(3)

Distance = 4(2)/(3)

Hence she walked 4(2)/(3) miles

im wondering the same thing i have this question to

Baseball cards come on packages of 8 and 12. Brighton bought some of each type for a total of 72 baseball cards. How many of each package did he buy?

Answers

4 packs of twelve cards and 3 packs of eight .
3 packages of 8 and 4 packages of 12

12 x 4 = 48
8 x 3 = 24

48 + 24 = 72 Cards

Help me solve this problem please

Answers

Answer:

y = -2x + 17

Step-by-step explanation:

y has to equal 5:

incorrect

y = -2x - 17

y = -2(6) - 17

y = -12 - 17

y = -29

incorrect

y = -2x - 16

y = -2(6) - 16

y = -12 - 16

y = -28

incorrect

y = -2x + 16

y = -2(6) + 16

y = -12 + 16

y = 4

correct

y = -2x + 17

y = -2(6) + 17

y = -12 + 17

y = 5
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