3 years ago

Solve please ? I need help

Mathematics

1 answer:

Vilka [71]3 years ago

4 0

5+8a=53

8a=48

a = 48/8 =6

since 5+8a is inside the lines, that is absolute value so you can use either 6 or -6

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What expression can be used to find the total discount? Select all that apply. 0.3*42 or 3/10*42 or 0.03*42 or 3 *4.2

ehidna [41]

0.3*42 this gives you a 30% discount

3/10*42 this gives you a 30% discount

0.03*42 this gives you a 3% discount

3 *4.2 This is not a discount

6 0

3 years ago

Solve. x2 + 14 = 9x A) x = 2, x = 7 B) x = 3, x = 5 C) x = −2, x = −7 D) x = −3, x = −5

chubhunter [2.5K]

Answer:

A) x = 2, x = 7

Step-by-step explanation:

x^2 + 14 = 9x

Subtract 9x from each side

x^2-9x + 14 = 9x-9x

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What 2 numbers multiply to 14 and add to -9

-7*-2 = 14

-7+-2 = -9

(x-7)(x-2) = 0

Using the zero product property

x-7 = 0 x-2 =0

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7 0

3 years ago

Please help!! See the attachment, please!

topjm [15]

Answer:

$946$

Step-by-step explanation:

we know that

The formula to find the sum is equal to

$S=(a1+an)n/2$

where

a1 is the first term

an is the last term

n is the number of terms

In this problem we have

$n=11$

$a1=(98-2(1))=96$

$an=(98-2(11))=76$

substitute the values in the formula

$S=(96+76)(11/2)=946$

5 0

3 years ago

Suku tengah barisan aritmetika adalah 15. Jika banyaknya suku barisan tersebut 11 dan suku ke 4 bernilai -3, tentukan suku terak

Lisa [10]

Answer:

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3 years ago

Prove that 3: 8 is equivalent to 12: 32

Kazeer [188]

3:8 can also be written as 3/8

12:32 can also be written as 12/32

$\frac{12}{32} = \frac{3\times 4}{8\times 4} = \frac{3}{8}$

So thus 3:8 is equivalent to 12:32

6 0

3 years ago