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3 years ago

Simplify the expression 7(2 + 1) + 3

Mathematics

2 answers:

Wittaler [7]3 years ago

5 0

Answer:

Step-by-step explanation:

7x2=14

7x1=7

14+7+3

=24

Mumz [18]3 years ago

5 0

Answer:

Step-by-step explanation:

Add what's in the parenthesis first then multiply that by 7 then add 3. ADD, MULTIPLY, ADD

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Witch value of x is in the solution of the following inequality -3x+5>17\

MA_775_DIABLO [31]

The answer is D. -3x+5=17 you subtract 5 on both side and you will get 12 then divide it by -3.

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4 years ago

Kate decides to replace all the lights in her college apartment with energy saving light bulbs beginning this month. The packagi

tatyana61 [14]

Answer:

Kate's electric bill will be $9 for this month for bulb use only.

Step-by-step explanation:

Given:

Electricity bill lass month from bulb use = $12

Using new bulbs percent decrease in electricity = 25%

We need to find this month electric bill for bulb use.

Solution:

First we will find the reduction in bill after using new bulbs.

reduction in bill after using new bulbs can be calculated by percent decrease in electricity using new bulb multiplied by last month Electricity bill from bulb use only.

framing in equation form we get;

reduction in bill after using new bulbs = $\frac{25}{100}\times 12 =\$3$

Now we will find this month electric bill for bulb use only.

this month electric bill for bulb use only can be calculated by subtracting reduction in bill after using new bulbs from last month electric bill for bulb use only.

framing in equation form we get;

this month electric bill for bulb use only = $\$12-\$3=\$9$

Hence Kate's electric bill will be $9 for this month for bulb use only.

3 0

3 years ago

Ada needs to make 140 egg tarts for the wedding. How many eggs should she buy from the store? Remember, her recipe makes 40 egg

just olya [345]

Answer:

Ada should buy 385 eggs from the store.

Step-by-step explanation:

Given that you know that Ada can make 40 egg tarts using 110 eggs, you can use a rule of three to find the amount eggs to make 140 egg tarts:

40 egg tarts → 110 eggs

140 egg tarts → x

x=(140*110)/40=385 eggs

According to this, the answer is that Ada should buy 385 eggs from the store.

7 0

3 years ago

Which triangle congruence postulate or theorem can be used to prove triangle FGH is congruent to triangle JKL

Svetradugi [14.3K]

It would be the side-angle-side theorem

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4 years ago

Blake is a member of a golf club. When he became a member, he deposited money into his club account. For each round of golf that

Leno4ka [110]

Answer:

D) Blake's account initially had $320, which is decreasing at the rate of $20 per round.

Step-by-step explanation:

Here, according to the question:

x: The total number of golf rounds played

y: Represents the amount, in dollars, left in his account after playing x rounds

Let as assume A is the amount deposited initially.

y = A - n x here n : rate of each round played

Also, here

if x = 2, then y = 280

if x =4, then y = 240

If x = 2 and y = 280, then:

y = A - n x ⇒ 280 = A - 2 n ... (1)

If x = 4 and y = 240, then:

y = A - n x ⇒ 240 = A - 4 n ... (2)

Solving (1) and (2) by (1) - (2), we get:

40 = 2 n or, n = 20

Putting n = 20 in 280 = A - 2 n, we get: A = 280 + 2(20) = 320

⇒ A = $320, n = $20

⇒ The amount initially deposited is $320 and the rate per round is $20

Hence ,Blake's account initially had $320, which is decreasing at the rate of $20 per round.

4 0

3 years ago