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tigry1 [53]
2 years ago
14

Work out:6(10 - 23) + 20​

Mathematics
1 answer:
barxatty [35]2 years ago
7 0

Answer:

-58

Step-by-step explanation:

6 (10 - 23) + 20​

=6 x (10 - 23) + 20​

= 6 x (- 13) + 20

= -78 + 20

= -58

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Heather can complete two problems in ten minutes, and when she started she had three problems done. Joel can complete three prob
Hunter-Best [27]
If Heather can do 2 in 10 minutes, then that means that she can do 12 in 1 hour. If Joel can do 3 in 15 minutes, then it means that he can do 12 in 1 hour. Add the number of problems they can do total and that will go between 30 and 50. It is just "less than", not "less than or equal to" because you want to know when the total number goes between the numbers.
Therefore, the correct answer must be <span>30 < 24x + 5 < 50.</span>
3 0
3 years ago
(4x^4+7x+5x^3)+(8x^4+6x^3-3x)-(4x^4+4x^3-8x)<br>plz help​
ryzh [129]

Answer:

8x⁴ - 7x³ + 12x

Step-by-step explanation:

=(4x⁴ + 7x + 5x³) + (8x⁴ + 6x³ - 3x)- (4x⁴ + 4x³ - 8x)

=4x⁴ + 7x + 5x³ + 8x⁴ + 6x³ - 3x - 4x⁴ - 4x³ + 8x

=4x⁴ + 8x⁴ - 4x⁴+ <em>5x³ + 6x³ - 4x³</em> + <u>7x - 3x + 8x</u>

=8x⁴ + 7x³ + 12x

4 0
3 years ago
4 times a number is 16​
andrey2020 [161]

Answer:

4 times 4 equals 16

Step-by-step explanation:

4 times 1= 4

4 times 2= 8

4 times 3= 12

4 times 4= 16

you add 4 after each result.

4 0
3 years ago
HURRY PLS! <br><br> Evaluate if a= 4 and b=7<br> 28÷ b+7<br><br> A. 14<br> B. 11
Nastasia [14]

Step-by-step explanation:

Hi, I think correct variant is B

(28÷7)+7=4+7=11

8 0
2 years ago
If ABF= (7x + 20), FBC=(2x - 5), and ABC= 159", find the value of x. x =
s2008m [1.1K]

Given :

∠ABF = ( 7x + 20 )°

∠FBC=(2x - 5)°

∠ABC= 159°

To Find :

The value of x .

Solution :

Assuming B the center of a circle .

So , all three given angles must be added to 360° .

(7x+20)+(2x-5)+159=360\\\\9x+15+159=360\\\\x=20.67

Therefore , the value of x is 20.67° .

Hence , this is the required solution .

3 0
3 years ago
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