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tensa zangetsu [6.8K]
3 years ago
6

Show working these two questions​

Mathematics
1 answer:
Tresset [83]3 years ago
8 0

Answer:

4(1- 2x)

h = 9 cm

Step-by-step explanation:

4 - 8x

= 4(1- 2x)

A(\triangle ABC) = \frac{1}{2} \times AB\times h

27= \frac{1}{2} \times 6\times h

27= 3\times h

h =\frac{27}{3}

h =9 \: cm

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Monica paid sales tax of $2.80 when she bought a new bike helmet. If the sales tax rate was 7%, how much did the store charge fo
larisa [96]

7 % of cost price is 2.80 , What about 1%?

7 = 2.80

1 = x   (where x is the price value of 1% in dollars)

We simplify the above equation, so:

7 × x = 2.8 × 1  →  7x = 2.8 →  x = 2.8 / 7  →   x = 0.4 dollars

We know that 100%  represents the whole price,

so if 1% is 0.4 dollars, then 100% will be 0.4 × 100 = 40 dollars

Therefore the store charged $40  dollars for the helmet before tax




5 0
3 years ago
I need help with this ​
LuckyWell [14K]

Answer:

1st - Yes ; 2nd - Yes ; 3rd - Yes ; 4th - No

Step-by-step explanation:

8 0
3 years ago
I need help please!!!!!!!
k0ka [10]

Answer:

1 roll of ribbon, 1 package of buttons, and 3 packages of beads

Step-by-step explanation:

Use the information you found about how much each makes to answer the question.

Lynette will make 6 decorations.

Since 1 roll makes 6, she needs 1 roll.

Since 1 package of buttons makes 6, she needs 1 package.

Since 1 package of beads makes 2, she needs 3 packages.

5 0
3 years ago
F(x)=4x squared −7x+7, Find f(2)
Lana71 [14]

Answer: 9

Step-by-step explanation:

4x²-7x+7   f(2)=4*(2)^2-7(2)+7=16-14+7=9

7 0
3 years ago
What is 9.4 x 100 I need a quick answerr
abruzzese [7]
Answer: 940

Explanation: A quick way to think of this is moving the decimal in 9.4 to the right by two decimal places (since there are two zeroes in 100) Hope this helps! :)
8 0
3 years ago
Read 2 more answers
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