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Elenna [48]
3 years ago
7

Solve this question ​

Mathematics
2 answers:
Natalija [7]3 years ago
8 0
I think the answer is 80
ryzh [129]3 years ago
7 0

Answer:

80

Step-by-step explanation:

Initial ratio:

Teachers to students

1 : 15

Ratio after:

Teachers to students

3 : 40

The number of students did not change, so we can make the students of the initial ratio and the students of the ratio after the same.

1 : 15 =  8 : 120

3 : 40 = 9 : 120

120 units = 1200

1 unit = \frac{1200}{120} =10

Initial teachers = 8 units = 8*10=80

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tekilochka [14]
        -3x - 3y > 5
-3x + 3y - 3y > 3x + 5
               -3y > 3x + 5
                -3         -3
                  y < -x - 1²/₃

The answer is C.

y < |x + 4| + 2

The answer is B.

3 0
3 years ago
—4 and 4 are ____________ because they have the same absolute value but different signs.
sergij07 [2.7K]
Opposites. Their sum is zero so they are called opposites.
3 0
3 years ago
-4x – 2y=-12<br> 4x + 8y=-24<br> Solve each system by elimination
kirza4 [7]

Answer:

x = 6 and y = - 6

Step-by-step explanation:

- 4 x - 2 y = -12.......equ No 1

 4 x +  8y = - 24.......equ No 2

Adding equ No 1 and equ No 2

6 y = - 36

∴ y = - 6

substitute y = - 6 in equ No 2

4 x + 8 y = -24

4 x + 8 ×( -6) = - 24

4 x - 48 = -24

4 x = -24 + 48

4 x = 24

∴ x = 6

x = 6 and y = - 6

7 0
3 years ago
What are the measures of angles B and C?
seropon [69]

Answer:

B. m<B = 65°; m<C = 115°

Step-by-step explanation:

First find the value of x:

3n + 20 = 6n - 25 (opposite bangles if a parallelogram are equal)

Collect like terms

3n - 6n = -20 - 25

-3n = -45

Divide both sides by -3

n = 15

✔️Find angle B:

m<B = 3n + 20

Plug in the value of n

m<B = 3(15) + 20

m<B = 45 + 20

m<B = 65°

✔️Find angle C:

m<C = 180 - m<B (consecutive angles of a parallelogram are supplementary)

m<C = 180 - 65

m<C = 115°

4 0
2 years ago
Read 2 more answers
Why is 24lb greater than 124oz?
devlian [24]

Answer:

1lb= 16oz

24(16)= 384

24lb= 384oz

Step-by-step explanation:

24lb is greater than 124oz after you convert the pounds to oz

if i'm correct please mark me as brainliest

5 0
2 years ago
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