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Charra [1.4K]
3 years ago
8

SOMEONE PLEASE HELP ME ASAP!! THANKS

Mathematics
1 answer:
vivado [14]3 years ago
7 0
Well you need to make sure you dont confuse yourself....it would be c hope this helps
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Evaluate the expression for t = –2.<br><br> t2 + 21t − 56 =
Keith_Richards [23]

Answer:

-94

Step-by-step explanation:

t² + 21t - 56

(-2)² + 21(-2) - 56

4 - 42 - 56

-38 - 56

-94

Best of Luck!

4 0
3 years ago
4|x+5|=20<br> Thanks for the help
Kipish [7]
4 |x = 5| = 20

First, divide both sides by 4. / Your problem should look like: |x + 5| = 5
Second, simplify \frac{20}{4} to 5. / Your problem should look like: |x + 5| = 5
Third, break the problem into 2 equations. / x + 5 = 5 and -(x + 5) = 5
Fourth, solve x + 5 = 5. / 
Cancel 5 on both sides. / x = 0
Fifth, solve -(x + 5) = 5 / 
Simplify brackets / -x - 5 = 5
Add 5 to both sides / -x = 5 + 5
Add 5 + 5 / -x = 10
Multiply both sides by -1 / x = -10
x = -10
Sixth, collect the solutions to the problems. / Your problem should look like: x = -10, 0

Answer: x = -10, 0

3 0
3 years ago
Read 2 more answers
In rhombus ABCD below, AC=30 cm and BD=18 cm. Find the area of the rhombus .I will give brainliest for the best and correct answ
barxatty [35]
Area of rhombus = 0.5 x D1 x D2

Thus,
Area = 0.5 x 30 x 18
= 270 units ^2
7 0
2 years ago
One number is 2 more than 3 times another. their sum is 22. find the numbers. 8, 14
bija089 [108]
X + y = 22
x = 3y + 2

3y + 2 + y = 22
4y + 2 = 22
4y = 22 - 2
4y = 20
y = 20/4
y = 5

x = 3y + 2 = 3(5) + 2 = 15 + 2 = 17

ur numbers are 5 and 17
4 0
3 years ago
Read 2 more answers
Need an answer, please need an answer, please​
trasher [3.6K]

Answer:

Step-by-step explanation:

Area = 192 m²

Perimeter= 56 m

Width = x m

Perimeter = 56

2*(length + width) = 56

Divide the equation by 2

l + x = 56/2

l + x = 28

    l = 28 - x

Area = 192 m²

l * w = 192

(28 - x)*x = 192

28x - x*x = 192

0 = 192 - 28x + x²

x² - 28x + 192 = 0

2) Equation is a quadratic equation. The roots of this equation will the dimensions of the rectangular plot.

3) The roots represent the width and length  of the rectangle.

x² - 28x +192 = 0

Sum = -28

Product =192

Factors =  -16 , -12   {-16 +(-12) = -28  & (-12)*(-16) = 192}

x² - 28x + 192 = 0

x² - 12x - 16x + (-16)*(-12) = 0

x(x  -12) - 16(x - 12) = 0

(x - 12)(x -16) =0

x -12 = 0     ; x - 16 = 0

x = 12  ; x = 16

x = 12 ,16

4) Sum of the roots = 12 + 16 = 28

Sum of the roots = half of the perimeter

5) Product of the roots = 12*16 = 192 =  area of the rectangle.

6 0
3 years ago
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