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murzikaleks [220]
4 years ago
8

WILL MAKE BRAINIEST IF YOU HELP ME

Mathematics
1 answer:
Wewaii [24]4 years ago
3 0

Answer:147 yd^3

Step-by-step explanation:

Base is a rectangle, so

area of the base = 7 × 9 = 63 yd^2

Volume of the pyramid = (base × height)/3

= (63 × 7)/3

= 147 yd^3

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Mai and Tyler work on the equation 2/5b+1=-11 together. Mais soulution is b=-25 and Tyler’s is b=-28. Here is their work. Do you
Anika [276]

Answer:

No I don't agree with their solution; both their answers are wrong.

Correct answer is b=-30.

Step-by-step explanation:

Given:

\frac{2}{5}b+1=-11

Now given:

According to Mai b = -25 and According to Tyler b = -28

Now we need to find which of them is correct.

So we will solve the given equation we get;

\frac{2}{5}b+1=-11

Subtracting both side by 1 we get;

\frac{2}{5}b+1-1=-11-1\\\\\frac{2}{5}b =-12

Now Multiplying both side \frac{5}{2} we get;

\frac{2}{5}b\times\frac{5}{2}= -12 \times \frac{5}{2}\\\\b=-6\times 5\\\\b=-30

Hence both of them are incorrect, correct answer is b=-30.

3 0
3 years ago
Nancy put new insulation in her attic and discovered that her heating bill for December decreased from $160 to $100. What is the
WINSTONCH [101]

Answer:

37.5% decrease

Step-by-step explanation:

To find a relative percentage you generally follow the rule of part divided by whole.

$100 / $160 = .625 (62.5%)

So $100 is 62.5% of $160

To find the decrease we need to subtract 62.5% from 100%

100 - 62.5 = 37.5

4 0
3 years ago
Please find the slope
Morgarella [4.7K]
The answer to your question is A: 5/3. To get to the top point, you have to go up 5, then go 3 to the right.
4 0
3 years ago
Read 2 more answers
HELPP is c Right?? picture shown
Crank
Hello :
the midepoint is( (-1+7)/2 ; (3+2)/2)
  (3, 5/2) ... answer C
8 0
3 years ago
Factor completely 64x2 − 49. (1 point)
Roman55 [17]

Answer:

(8x-7)(8x+7)

Step-by-step explanation:

This is a difference of squares polynomial of the form a^2-b^2=(a+b)(a-b). Since 64 and 9 are both perfect squares then take the square root of each so a=8 and b=7.

Factors:(8x-7)(8x+7)

6 0
3 years ago
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