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4 years ago

How to solve this question.

Mathematics

1 answer:

JulsSmile [24]4 years ago

3 0

We know: The sum of measures of angles in the triangle is equal 180°.

x - the measure of the second angle

2x - the measure of the first angle

x - 8° - the measure of the third angle

The equation:

$2x+x+x-8=180\\\\4x-8=180\ \ \ \ |+8\\\\4x=188\ \ \ \ |:4\\\\x=47$

Answer:

$2x=2\cdot47^o=94^o\\\\x=47^o\\\\x-8^o=47^o-8^o=39^o$

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you have an ant farm with 34 ants. the population of your ants will double every 3 months. the table shows the population growth

kirza4 [7]

If you multiply 272 by 2 u’ll get 544 Nd if u multiply 544 by 2 u’ll get 1,088 that’s after a year

8 0

3 years ago

Which equation represents the line that passes through the points (2,7) and (1, 4)?

mojhsa [17]

Answer:

y=3x+1

Step-by-step explanation:

Use the slope formula and slope-intercept form y = m x + b to find the equation.

4 0

3 years ago

Read 2 more answers

Ginny's piggybank contained $8.80 in quarters, dimes, and nickels. there were two more than five times as many nickels as quarte

SSSSS [86.1K]

Answer:

There are 13 quarters, 67 nickels, and 22 dimes.

Step-by-step explanation:

The value of a quarter is $0.25, the value of dime is $0.10, and the value of a nickel is $0.05. Let there be q quarters, n nickels, and d dimes.

Let's write equations from the statements given:

"Ginny's piggybank contained $8.80 in quarters, dimes, and nickels.":

$0.25q+0.1d+0.05n=8.80$

"there were two more than five times as many nickels as quarters":

$5q+2=n$

"4 less than twice as many dimes as quarters":

$2q-4=d$

Plugging in equation 2 and 3 into equation 1, we can solve for q:

$0.25q+0.1(2q-4)+0.05(5q+2)=8.80\\0.25q+0.2q-0.4+0.25q+0.1=8.80\\0.7q=8.80+0.4-0.1\\0.7q=9.1\\q=\frac{9.1}{0.7}=13$

Substituting q = 13 into equation 2 will give us nickels:

$n=5q+2\\n=5(13)+2\\n=67$

Substituting q = 13 into equation 3 will give us dimes:

$d=2q-4\\d=2(13)-4\\d=22$

There are 13 quarters, 67 nickels, and 22 dimes.

4 0

3 years ago

-27=-9x-18y -5y-10x-15=0

lora16 [44]

Answer:

x=-3

y=3

Step-by-step explanation:

-27=-9x-18y equation 1

-5y-10x-15=0 equation 2

using equation 2 we have:

-10x -15 =5y

y= -2x -3 equation 3

using equation 3 in equation 1 we have:

-27=-9x-18(-2x -3)

-27= -9x +36x +54

-27-54 =27x

-81 = 27x

so we have:

x= -81/27

x=-3

y= -2(-3) -3

y= 6-3

y = 3

4 0

3 years ago

X/2 -5=20 please give details

vladimir1956 [14]

Answer: x=50

how?

$\frac{x}{2}$ - 5= 20 (first ADD 5 with 20 whatever you do on one side you have to do it to the other) so that gives us:

$\frac{x}{2}$ =25 (we see that 2 is being divided by x and we want X alone so the inverse of division is MULTIPLICATION)

25 x 2= 50

therefor the x=50

6 0

3 years ago